inclusion criteria: * provide informed consent from the subject or the subject's legally authorized representative (lar) * aged ≥18 years * severe acute respiratory syndrome coronavirus (sars-cov-2) infection confirmed by polymerase chain reaction (pcr) test * patients with a who ordinal scale for clinical improvement score of 4 at high risk for ards, must have at least one of the known comorbidities for being at high risk, such as, asthma (moderate to severe), chronic lung disease, diabetes, hypertension, severe obesity (bmi ≥40), 65 years of age or older, primarily reside in a nursing home or long-term care facility, or immunocompromised and patients with a who ordinal scale for clinical improvement score of 5 or 6 regardless of presence of comorbidities. * who ordinal scale for clinical improvement score of 4 (oxygen by mask or nasal prongs), 5 (non-invasive ventilation or high-flow oxygen) or 6 (intubation and mechanical ventilation) * peripheral capillary oxygen saturation (spo2) ≤ 94% on room air at screening. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels were ≤94% prior to introduction to oxygen therapy with proper documentation example emt notes or er/ed notes, then the patient is considered to have met this inclusion criterion. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels prior to introduction to oxygen therapy are unknown, the patient may be considered to have met this inclusion criterion if oxygen therapy is removed and the spo2 levels fall to ≤94%, then the patient is considered to have met this inclusion criterion. however, removal of the oxygen therapy should only be done if it is considered medically reasonable * subjects must agree to follow doctor's recommendation for oxygen supplementation * subjects must agree to use acceptable methods of contraception: * if female of childbearing potential or a male subject's partner could become pregnant, use acceptable methods of contraception from the time of the first administration of study medication until 6months following administration of the last dose of study medication. acceptable methods of contraception are as follows: condom with spermicidal foam/gel/film/cream/suppository \[i.e., barrier method of contraception\], surgical sterilization (vasectomy with documentation of azospermia) and a barrier method {condom used with spermicidal foam/gel/film/cream/suppository}, the female partner uses oral contraceptives (combination estrogen/progesterone pills), injectable progesterone or subdermal implants and a barrier method (condom used with spermicidal foam/gel/film/cream/suppository) * if the female partner of a male subject has undergone documented tuballigation (female sterilization), a barrier method (condom used with spermicidal foam/gel/film/cream/suppository)should also be used * if female partner of a male subject has undergone documented placement of an intrauterine device (iud) or intrauterine system (ius),a barrier method (condom with spermicidal foam/gel/film/cream/suppository)should also be used * subject is willing to comply with the requirements of the protocol through the end of the study

inclusion criteria: * provide informed consent from the subject or the subject's legally authorized representative (lar) * aged ≥18 years * severe acute respiratory syndrome coronavirus (sars-cov-2) infection confirmed by polymerase chain reaction (pcr) test * patients with a who ordinal scale for clinical improvement score of 4 at high risk for ards, must have at least one of the known comorbidities for being at high risk, such as, asthma (moderate to severe), chronic lung disease, diabetes, hypertension, severe obesity (bmi ≥40), 65 years of age or older, primarily reside in a nursing home or long-term care facility, or immunocompromised and patients with a who ordinal scale for clinical improvement score of 5 or 6 regardless of presence of comorbidities. * who ordinal scale for clinical improvement score of 4 (oxygen by mask or nasal prongs), 5 (non-invasive ventilation or high-flow oxygen) or 6 (intubation and mechanical ventilation) * peripheral capillary oxygen saturation (spo2) ≤ 94% on room air at screening. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels were ≤94% prior to introduction to oxygen therapy with proper documentation example emt notes or er/ed notes, then the patient is considered to have met this inclusion criterion. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels prior to introduction to oxygen therapy are unknown, the patient may be considered to have met this inclusion criterion if oxygen therapy is removed and the spo2 levels fall to ≤94%, then the patient is considered to have met this inclusion criterion. however, removal of the oxygen therapy should only be done if it is considered medically reasonable * subjects must agree to follow doctor's recommendation for oxygen supplementation * subjects must agree to use acceptable methods of contraception: * if female of childbearing potential or a male subject's partner could become pregnant, use acceptable methods of contraception from the time of the first administration of study medication until 6months following administration of the last dose of study medication. acceptable methods of contraception are as follows: condom with spermicidal foam/gel/film/cream/suppository \[i.e., barrier method of contraception\], surgical sterilization (vasectomy with documentation of azospermia) and a barrier method {condom used with spermicidal foam/gel/film/cream/suppository}, the female partner uses oral contraceptives (combination estrogen/progesterone pills), injectable progesterone or subdermal implants and a barrier method (condom used with spermicidal foam/gel/film/cream/suppository) * if the female partner of a male subject has undergone documented tuballigation (female sterilization), a barrier method (condom used with spermicidal foam/gel/film/cream/suppository)should also be used * if female partner of a male subject has undergone documented placement of an intrauterine device (iud) or intrauterine system (ius),a barrier method (condom with spermicidal foam/gel/film/cream/suppository)should also be used * subject is willing to comply with the requirements of the protocol through the end of the study

inclusion criteria: - provide informed consent from the subject or the subject's legally authorized representative (lar) - aged ≥18 years - severe acute respiratory syndrome coronavirus (sars-cov-2) infection confirmed by polymerase chain reaction (pcr) test - patients with a who ordinal scale for clinical improvement score of 4 at high risk for ards, must have at least one of the known comorbidities for being at high risk, such as, asthma (moderate to severe), chronic lung disease, diabetes, hypertension, severe obesity (bmi ≥40), 65 years of age or older, primarily reside in a nursing home or long-term care facility, or immunocompromised and patients with a who ordinal scale for clinical improvement score of 5 or 6 regardless of presence of comorbidities. - who ordinal scale for clinical improvement score of 4 (oxygen by mask or nasal prongs), 5 (non-invasive ventilation or high-flow oxygen) or 6 (intubation and mechanical ventilation) - peripheral capillary oxygen saturation (spo2) ≤ 94% on room air at screening. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels were ≤94% prior to introduction to oxygen therapy with proper documentation example emt notes or er/ed notes, then the patient is considered to have met this inclusion criterion. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels prior to introduction to oxygen therapy are unknown, the patient may be considered to have met this inclusion criterion if oxygen therapy is removed and the spo2 levels fall to ≤94%, then the patient is considered to have met this inclusion criterion. however, removal of the oxygen therapy should only be done if it is considered medically reasonable - subjects must agree to follow doctor's recommendation for oxygen supplementation - subjects must agree to use acceptable methods of contraception: - if female of childbearing potential or a male subject's partner could become pregnant, use acceptable methods of contraception from the time of the first administration of study medication until 6months following administration of the last dose of study medication. acceptable methods of contraception are as follows: condom with spermicidal foam/gel/film/cream/suppository [i.e., barrier method of contraception], surgical sterilization (vasectomy with documentation of azospermia) and a barrier method {condom used with spermicidal foam/gel/film/cream/suppository}, the female partner uses oral contraceptives (combination estrogen/progesterone pills), injectable progesterone or subdermal implants and a barrier method (condom used with spermicidal foam/gel/film/cream/suppository) - if the female partner of a male subject has undergone documented tuballigation (female sterilization), a barrier method (condom used with spermicidal foam/gel/film/cream/suppository)should also be used - if female partner of a male subject has undergone documented placement of an intrauterine device (iud) or intrauterine system (ius),a barrier method (condom with spermicidal foam/gel/film/cream/suppository)should also be used - subject is willing to comply with the requirements of the protocol through the end of the study

inclusion criteria: - provide informed consent from the subject or the subject's legally authorized representative (lar) - aged ≥18 years - severe acute respiratory syndrome coronavirus (sars-cov-2) infection confirmed by polymerase chain reaction (pcr) test - patients with a who ordinal scale for clinical improvement score of 4 at high risk for ards, must have at least one of the known comorbidities for being at high risk, such as, asthma (moderate to severe), chronic lung disease, diabetes, hypertension, severe obesity (bmi ≥40), 65 years of age or older, primarily reside in a nursing home or long-term care facility, or immunocompromised and patients with a who ordinal scale for clinical improvement score of 5 or 6 regardless of presence of comorbidities. - who ordinal scale for clinical improvement score of 4 (oxygen by mask or nasal prongs), 5 (non-invasive ventilation or high-flow oxygen) or 6 (intubation and mechanical ventilation) - peripheral capillary oxygen saturation (spo2) ≤ 94% on room air at screening. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels were ≤94% prior to introduction to oxygen therapy with proper documentation example emt notes or er/ed notes, then the patient is considered to have met this inclusion criterion. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels prior to introduction to oxygen therapy are unknown, the patient may be considered to have met this inclusion criterion if oxygen therapy is removed and the spo2 levels fall to ≤94%, then the patient is considered to have met this inclusion criterion. however, removal of the oxygen therapy should only be done if it is considered medically reasonable - subjects must agree to follow doctor's recommendation for oxygen supplementation - subjects must agree to use acceptable methods of contraception: - if female of childbearing potential or a male subject's partner could become pregnant, use acceptable methods of contraception from the time of the first administration of study medication until 6months following administration of the last dose of study medication. acceptable methods of contraception are as follows: condom with spermicidal foam/gel/film/cream/suppository [i.e., barrier method of contraception], surgical sterilization (vasectomy with documentation of azospermia) and a barrier method {condom used with spermicidal foam/gel/film/cream/suppository}, the female partner uses oral contraceptives (combination estrogen/progesterone pills), injectable progesterone or subdermal implants and a barrier method (condom used with spermicidal foam/gel/film/cream/suppository) - if the female partner of a male subject has undergone documented tuballigation (female sterilization), a barrier method (condom used with spermicidal foam/gel/film/cream/suppository)should also be used - if female partner of a male subject has undergone documented placement of an intrauterine device (iud) or intrauterine system (ius),a barrier method (condom with spermicidal foam/gel/film/cream/suppository)should also be used - subject is willing to comply with the requirements of the protocol through the end of the study

inclusion criteria: - provide informed consent from the subject or the subject's legally authorized representative (lar) - aged ≥18 years - severe acute respiratory syndrome coronavirus (sars-cov-2) infection confirmed by polymerase chain reaction (pcr) test - patients with a who ordinal scale for clinical improvement score of 4 at high risk for ards, must have at least one of the known comorbidities for being at high risk, such as, asthma (moderate to severe), chronic lung disease, diabetes, severe obesity (bmi ≥40), 65 years of age or older, primarily reside in a nursing home or long-term care facility, or immunocompromised and patients with a who ordinal scale for clinical improvement score of 5 or 6 regardless of presence of comorbidities. - who ordinal scale for clinical improvement score of 4 (oxygen by mask or nasal prongs), 5 (non-invasive ventilation or high-flow oxygen) or 6 (intubation and mechanical ventilation) - peripheral capillary oxygen saturation (spo2) ≤ 94% on room air at screening. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels were ≤94% prior to introduction to oxygen therapy with proper documentation example emt notes or er/ed notes, then the patient is considered to have met this inclusion criterion. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels prior to introduction to oxygen therapy are unknown, the patient may be considered to have met this inclusion criterion if oxygen therapy is removed and the spo2 levels fall to ≤94%, then the patient is considered to have met this inclusion criterion. however, removal of the oxygen therapy should only be done if it is considered medically reasonable - subjects must agree to follow doctor's recommendation for oxygen supplementation - subjects must agree to use acceptable methods of contraception: - if female of childbearing potential or a male subject's partner could become pregnant, use acceptable methods of contraception from the time of the first administration of study medication until 6months following administration of the last dose of study medication. acceptable methods of contraception are as follows: condom with spermicidal foam/gel/film/cream/suppository [i.e., barrier method of contraception], surgical sterilization (vasectomy with documentation of azospermia) and a barrier method {condom used with spermicidal foam/gel/film/cream/suppository}, the female partner uses oral contraceptives (combination estrogen/progesterone pills), injectable progesterone or subdermal implants and a barrier method (condom used with spermicidal foam/gel/film/cream/suppository) - if the female partner of a male subject has undergone documented tuballigation (female sterilization), a barrier method (condom used with spermicidal foam/gel/film/cream/suppository)should also be used - if female partner of a male subject has undergone documented placement of an intrauterine device (iud) or intrauterine system (ius),a barrier method (condom with spermicidal foam/gel/film/cream/suppository)should also be used - subject is willing to comply with the requirements of the protocol through the end of the study

inclusion criteria: - provide informed consent from the subject or the subject's legally authorized representative (lar) - aged ≥18 years - severe acute respiratory syndrome coronavirus (sars-cov-2) infection confirmed by polymerase chain reaction (pcr) test - patients with a who ordinal scale for clinical improvement score of 4 at high risk for ards, must have at least one of the known comorbidities for being at high risk, such as, asthma (moderate to severe), chronic lung disease, diabetes, severe obesity (bmi ≥40), 65 years of age or older, primarily reside in a nursing home or long-term care facility, or immunocompromised and patients with a who ordinal scale for clinical improvement score of 5 or 6 regardless of presence of comorbidities. - who ordinal scale for clinical improvement score of 4 (oxygen by mask or nasal prongs), 5 (non-invasive ventilation or high-flow oxygen) or 6 (intubation and mechanical ventilation) - peripheral capillary oxygen saturation (spo2) ≤ 94% on room air at screening. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels were ≤94% prior to introduction to oxygen therapy with proper documentation example emt notes or er/ed notes, then the patient is considered to have met this inclusion criterion. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels prior to introduction to oxygen therapy are unknown, the patient may be considered to have met this inclusion criterion if oxygen therapy is removed and the spo2 levels fall to ≤94%, then the patient is considered to have met this inclusion criterion. however, removal of the oxygen therapy should only be done if it is considered medically reasonable - subjects must agree to follow doctor's recommendation for oxygen supplementation - subjects must agree to use acceptable methods of contraception: - if female of childbearing potential or a male subject's partner could become pregnant, use acceptable methods of contraception from the time of the first administration of study medication until 6months following administration of the last dose of study medication. acceptable methods of contraception are as follows: condom with spermicidal foam/gel/film/cream/suppository [i.e., barrier method of contraception], surgical sterilization (vasectomy with documentation of azospermia) and a barrier method {condom used with spermicidal foam/gel/film/cream/suppository}, the female partner uses oral contraceptives (combination estrogen/progesterone pills), injectable progesterone or subdermal implants and a barrier method (condom used with spermicidal foam/gel/film/cream/suppository) - if the female partner of a male subject has undergone documented tuballigation (female sterilization), a barrier method (condom used with spermicidal foam/gel/film/cream/suppository)should also be used - if female partner of a male subject has undergone documented placement of an intrauterine device (iud) or intrauterine system (ius),a barrier method (condom with spermicidal foam/gel/film/cream/suppository)should also be used - subject is willing to comply with the requirements of the protocol through the end of the study

inclusion criteria: - provide informed consent from the subject or the subject's legally authorized representative (lar) - aged ≥18 years - severe acute respiratory syndrome coronavirus (sars-cov-2) infection confirmed by polymerase chain reaction (pcr) test - patients at high risk for ards, must have at least one of the known comorbidities for being at high risk, such as, asthma (moderate to severe), chronic lung disease, diabetes, severe obesity (bmi ≥40), 65 years of age or older, primarily reside in a nursing home or long-term care facility, or immunocompromised - who ordinal scale for clinical improvement score of 4 (oxygen by mask or nasal prongs), 5 (non-invasive ventilation or high-flow oxygen) or 6 (intubation and mechanical ventilation) - peripheral capillary oxygen saturation (spo2) ≤ 94% on room air at screening. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels were ≤94% prior to introduction to oxygen therapy with proper documentation example emt notes or er/ed notes, then the patient is considered to have met this inclusion criterion. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels prior to introduction to oxygen therapy are unknown, the patient may be considered to have met this inclusion criterion if oxygen therapy is removed and the spo2 levels fall to ≤94%, then the patient is considered to have met this inclusion criterion. however, removal of the oxygen therapy should only be done if it is considered medically reasonable - subjects must agree to follow doctor's recommendation for oxygen supplementation - subjects must agree to use acceptable methods of contraception: - if female of childbearing potential or a male subject's partner could become pregnant, use acceptable methods of contraception from the time of the first administration of study medication until 6months following administration of the last dose of study medication. acceptable methods of contraception are as follows: condom with spermicidal foam/gel/film/cream/suppository [i.e., barrier method of contraception], surgical sterilization (vasectomy with documentation of azospermia) and a barrier method {condom used with spermicidal foam/gel/film/cream/suppository}, the female partner uses oral contraceptives (combination estrogen/progesterone pills), injectable progesterone or subdermal implants and a barrier method (condom used with spermicidal foam/gel/film/cream/suppository) - if the female partner of a male subject has undergone documented tuballigation (female sterilization), a barrier method (condom used with spermicidal foam/gel/film/cream/suppository)should also be used - if female partner of a male subject has undergone documented placement of an intrauterine device (iud) or intrauterine system (ius),a barrier method (condom with spermicidal foam/gel/film/cream/suppository)should also be used - subject is willing to comply with the requirements of the protocol through the end of the study

inclusion criteria: - provide informed consent from the subject or the subject's legally authorized representative (lar) - aged ≥18 years - severe acute respiratory syndrome coronavirus (sars-cov-2) infection confirmed by polymerase chain reaction (pcr) test - patients at high risk for ards, must have at least one of the known comorbidities for being at high risk, such as, asthma (moderate to severe), chronic lung disease, diabetes, severe obesity (bmi ≥40), 65 years of age or older, primarily reside in a nursing home or long-term care facility, or immunocompromised - who ordinal scale for clinical improvement score of 4 (oxygen by mask or nasal prongs), 5 (non-invasive ventilation or high-flow oxygen) or 6 (intubation and mechanical ventilation) - peripheral capillary oxygen saturation (spo2) ≤ 94% on room air at screening. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels were ≤94% prior to introduction to oxygen therapy with proper documentation example emt notes or er/ed notes, then the patient is considered to have met this inclusion criterion. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels prior to introduction to oxygen therapy are unknown, the patient may be considered to have met this inclusion criterion if oxygen therapy is removed and the spo2 levels fall to ≤94%, then the patient is considered to have met this inclusion criterion. however, removal of the oxygen therapy should only be done if it is considered medically reasonable - subjects must agree to follow doctor's recommendation for oxygen supplementation - subjects must agree to use acceptable methods of contraception: - if female of childbearing potential or a male subject's partner could become pregnant, use acceptable methods of contraception from the time of the first administration of study medication until 6months following administration of the last dose of study medication. acceptable methods of contraception are as follows: condom with spermicidal foam/gel/film/cream/suppository [i.e., barrier method of contraception], surgical sterilization (vasectomy with documentation of azospermia) and a barrier method {condom used with spermicidal foam/gel/film/cream/suppository}, the female partner uses oral contraceptives (combination estrogen/progesterone pills), injectable progesterone or subdermal implants and a barrier method (condom used with spermicidal foam/gel/film/cream/suppository) - if the female partner of a male subject has undergone documented tuballigation (female sterilization), a barrier method (condom used with spermicidal foam/gel/film/cream/suppository)should also be used - if female partner of a male subject has undergone documented placement of an intrauterine device (iud) or intrauterine system (ius),a barrier method (condom with spermicidal foam/gel/film/cream/suppository)should also be used - subject is willing to comply with the requirements of the protocol through the end of the study

inclusion criteria: - provide informed consent from the subject or the subject's legally authorized representative (lar) - aged ≥18 years - severe acute respiratory syndrome coronavirus (sars-cov-2) infection confirmed by polymerase chain reaction (pcr) test - patients at high risk for ards, with known comorbidities for being at high risk, such as, asthma (moderate to severe), chronic lung disease, diabetes, chronic kidney disease being treated with dialysis, severe obesity (bmi ≥40), 65 years of age or older, primarily reside in a nursing home or long-term care facility, or immunocompromised - who ordinal scale for clinical improvement score of 4 (oxygen by mask or nasal prongs), 5 (non-invasive ventilation or high-flow oxygen) or 6 (intubation and mechanical ventilation) - peripheral capillary oxygen saturation (spo2) ≤ 94% on room air at screening. if patient is on oxygen therapy at the time of presentation for screening and the spo2levels were - 94% prior to introduction to oxygen therapy with proper documentation example emt notes or er/ed notes, then the patient is considered to have met this inclusion criterion. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels prior to introduction to oxygen therapy are unknown, the patient may be considered to have met this inclusion criterion if oxygen therapy is removed and the spo2 levels fall to ≤94%, then the patient is considered to have met this inclusion criterion. however, removal of the oxygen therapy should only be done if it is considered medically reasonable - subjects must agree to follow doctor's recommendation for oxygen supplementation - subjects must agree to use acceptable methods of contraception: - if female of childbearing potential or a male subject's partner could become pregnant, use acceptable methods of contraception from the time of the first administration of study medication until 6months following administration of the last dose of study medication. acceptable methods of contraception are as follows: condom with spermicidal foam/gel/film/cream/suppository [i.e., barrier method of contraception], surgical sterilization (vasectomy with documentation of azospermia) and a barrier method {condom used with spermicidal foam/gel/film/cream/suppository}, the female partner uses oral contraceptives (combination estrogen/progesterone pills), injectable progesterone or subdermal implants and a barrier method (condom used with spermicidal foam/gel/film/cream/suppository) - if the female partner of a male subject has undergone documented tuballigation (female sterilization), a barrier method (condom used with spermicidal foam/gel/film/cream/suppository)should also be used - if female partner of a male subject has undergone documented placement of an intrauterine device (iud) or intrauterine system (ius),a barrier method (condom with spermicidal foam/gel/film/cream/suppository)should also be used - subject is willing to comply with the requirements of the protocol through the end of the study

inclusion criteria: - provide informed consent from the subject or the subject's legally authorized representative (lar) - aged ≥18 years - severe acute respiratory syndrome coronavirus (sars-cov-2) infection confirmed by polymerase chain reaction (pcr) test - patients at high risk for ards, with known comorbidities for being at high risk, such as, asthma (moderate to severe), chronic lung disease, diabetes, chronic kidney disease being treated with dialysis, severe obesity (bmi ≥40), 65 years of age or older, primarily reside in a nursing home or long-term care facility, or immunocompromised - who ordinal scale for clinical improvement score of 4 (oxygen by mask or nasal prongs), 5 (non-invasive ventilation or high-flow oxygen) or 6 (intubation and mechanical ventilation) - peripheral capillary oxygen saturation (spo2) ≤ 94% on room air at screening. if patient is on oxygen therapy at the time of presentation for screening and the spo2levels were - 94% prior to introduction to oxygen therapy with proper documentation example emt notes or er/ed notes, then the patient is considered to have met this inclusion criterion. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels prior to introduction to oxygen therapy are unknown, the patient may be considered to have met this inclusion criterion if oxygen therapy is removed and the spo2 levels fall to ≤94%, then the patient is considered to have met this inclusion criterion. however, removal of the oxygen therapy should only be done if it is considered medically reasonable - subjects must agree to follow doctor's recommendation for oxygen supplementation - subjects must agree to use acceptable methods of contraception: - if female of childbearing potential or a male subject's partner could become pregnant, use acceptable methods of contraception from the time of the first administration of study medication until 6months following administration of the last dose of study medication. acceptable methods of contraception are as follows: condom with spermicidal foam/gel/film/cream/suppository [i.e., barrier method of contraception], surgical sterilization (vasectomy with documentation of azospermia) and a barrier method {condom used with spermicidal foam/gel/film/cream/suppository}, the female partner uses oral contraceptives (combination estrogen/progesterone pills), injectable progesterone or subdermal implants and a barrier method (condom used with spermicidal foam/gel/film/cream/suppository) - if the female partner of a male subject has undergone documented tuballigation (female sterilization), a barrier method (condom used with spermicidal foam/gel/film/cream/suppository)should also be used - if female partner of a male subject has undergone documented placement of an intrauterine device (iud) or intrauterine system (ius),a barrier method (condom with spermicidal foam/gel/film/cream/suppository)should also be used - subject is willing to comply with the requirements of the protocol through the end of the study

inclusion criteria: - provide informed consent from the subject or the subject's legally authorized representative (lar) - aged ≥18 years - severe acute respiratory syndrome coronavirus (sars-cov-2) infection confirmed by polymerase chain reaction (pcr) test - patients at high risk for ards, with known comorbidities for being at high risk, such as, asthma (moderate to severe), chronic lung disease, diabetes, chronic kidney disease being treated with dialysis, severe obesity (bmi ≥40), 65 years of age or older, primarily reside in a nursing home or long-term care facility, or immunocompromised - who ordinal scale for clinical improvement score of 5 (non-invasive ventilation or high-flow oxygen) or 6 (intubation and mechanical ventilation) - peripheral capillary oxygen saturation (spo2) ≤ 94% on room air at screening. if patient is on oxygen therapy at the time of presentation for screening and the spo2levels were - 94% prior to introduction to oxygen therapy with proper documentation example emt notes or er/ed notes, then the patient is considered to have met this inclusion criterion. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels prior to introduction to oxygen therapy are unknown, the patient may be considered to have met this inclusion criterion if oxygen therapy is removed and the spo2 levels fall to ≤94%, then the patient is considered to have met this inclusion criterion. however, removal of the oxygen therapy should only be done if it is considered medically reasonable - subjects must agree to follow doctor's recommendation for oxygen supplementation - subjects must agree to use acceptable methods of contraception: - if female of childbearing potential or a male subject's partner could become pregnant, use acceptable methods of contraception from the time of the first administration of study medication until 6months following administration of the last dose of study medication. acceptable methods of contraception are as follows: condom with spermicidal foam/gel/film/cream/suppository [i.e., barrier method of contraception], surgical sterilization (vasectomy with documentation of azospermia) and a barrier method {condom used with spermicidal foam/gel/film/cream/suppository}, the female partner uses oral contraceptives (combination estrogen/progesterone pills), injectable progesterone or subdermal implants and a barrier method (condom used with spermicidal foam/gel/film/cream/suppository) - if the female partner of a male subjecthas undergone documented tuballigation (female sterilization), a barrier method (condom used with spermicidal foam/gel/film/cream/suppository)should also be used - if female partner of a male subjecthas undergone documented placement of an intrauterine device (iud) or intrauterine system (ius),a barrier method (condom with spermicidal foam/gel/film/cream/suppository)should also be used - subject is willing to comply with the requirements of the protocol through the end of the study

inclusion criteria: - provide informed consent from the subject or the subject's legally authorized representative (lar) - aged ≥18 years - severe acute respiratory syndrome coronavirus (sars-cov-2) infection confirmed by polymerase chain reaction (pcr) test - patients at high risk for ards, with known comorbidities for being at high risk, such as, asthma (moderate to severe), chronic lung disease, diabetes, chronic kidney disease being treated with dialysis, severe obesity (bmi ≥40), 65 years of age or older, primarily reside in a nursing home or long-term care facility, or immunocompromised - who ordinal scale for clinical improvement score of 5 (non-invasive ventilation or high-flow oxygen) or 6 (intubation and mechanical ventilation) - peripheral capillary oxygen saturation (spo2) ≤ 94% on room air at screening. if patient is on oxygen therapy at the time of presentation for screening and the spo2levels were - 94% prior to introduction to oxygen therapy with proper documentation example emt notes or er/ed notes, then the patient is considered to have met this inclusion criterion. if patient is on oxygen therapy at the time of presentation for screening and the spo2 levels prior to introduction to oxygen therapy are unknown, the patient may be considered to have met this inclusion criterion if oxygen therapy is removed and the spo2 levels fall to ≤94%, then the patient is considered to have met this inclusion criterion. however, removal of the oxygen therapy should only be done if it is considered medically reasonable - subjects must agree to follow doctor's recommendation for oxygen supplementation - subjects must agree to use acceptable methods of contraception: - if female of childbearing potential or a male subject's partner could become pregnant, use acceptable methods of contraception from the time of the first administration of study medication until 6months following administration of the last dose of study medication. acceptable methods of contraception are as follows: condom with spermicidal foam/gel/film/cream/suppository [i.e., barrier method of contraception], surgical sterilization (vasectomy with documentation of azospermia) and a barrier method {condom used with spermicidal foam/gel/film/cream/suppository}, the female partner uses oral contraceptives (combination estrogen/progesterone pills), injectable progesterone or subdermal implants and a barrier method (condom used with spermicidal foam/gel/film/cream/suppository) - if the female partner of a male subjecthas undergone documented tuballigation (female sterilization), a barrier method (condom used with spermicidal foam/gel/film/cream/suppository)should also be used - if female partner of a male subjecthas undergone documented placement of an intrauterine device (iud) or intrauterine system (ius),a barrier method (condom with spermicidal foam/gel/film/cream/suppository)should also be used - subject is willing to comply with the requirements of the protocol through the end of the study