* no informed consent * persistent hypoxemia with spo2 \< 90% despite supplemental oxygen of \> 6lo2/min at screening. * patients with predominantly extrapulmonary covid-19 symptoms (e.g. gastrointestinal, neurological, etc.) * subjects who demonstrate respiratory and/or cardiac instability that is considered by the investigator as a reason for exclusion. additionally, any other clinically significant disease that could interfere with participation in the study, with the intervention being studied, or with the evaluation of symptoms. specific exclusions are asthma, immune deficiency, autoimmune disease, clinically significant cardiovascular, endocrinological, neurological, respiratory, gastrointestinal disease or any disease that is considered by the investigator as a reason for exclusion. * known hypersensitivity or allergy to any component of the test product * the subject is related to any study personnel or has any other close ties or conflicts of interest with the study sponsor. * the subject has received any investigational drug or participated in a clinical trial within 4 weeks of entry to this study * current medication other than oral contraception,that is considered by the investigator as a reason for exclusion. * pregnant/lactating women at the time of recruitment will be excluded from the study * participation in another antiviral clinical trial

* no informed consent * persistent hypoxemia with spo2 \< 90% despite supplemental oxygen of \> 6lo2/min at screening. * patients with predominantly extrapulmonary covid-19 symptoms (e.g. gastrointestinal, neurological, etc.) * subjects who demonstrate respiratory and/or cardiac instability that is considered by the investigator as a reason for exclusion. additionally, any other clinically significant disease that could interfere with participation in the study, with the intervention being studied, or with the evaluation of symptoms. specific exclusions are asthma, immune deficiency, autoimmune disease, clinically significant cardiovascular, endocrinological, neurological, respiratory, gastrointestinal disease or any disease that is considered by the investigator as a reason for exclusion. * known hypersensitivity or allergy to any component of the test product * the subject is related to any study personnel or has any other close ties or conflicts of interest with the study sponsor. * the subject has received any investigational drug or participated in a clinical trial within 4 weeks of entry to this study * current medication other than oral contraception,that is considered by the investigator as a reason for exclusion. * pregnant/lactating women at the time of recruitment will be excluded from the study * participation in another antiviral clinical trial

- no informed consent - persistent hypoxemia with spo2 < 90% despite supplemental oxygen of > 6lo2/min at screening. - patients with predominantly extrapulmonary covid-19 symptoms (e.g. gastrointestinal, neurological, etc.) - subjects who demonstrate respiratory and/or cardiac instability that is considered by the investigator as a reason for exclusion. additionally, any other clinically significant disease that could interfere with participation in the study, with the intervention being studied, or with the evaluation of symptoms. specific exclusions are asthma, immune deficiency, autoimmune disease, clinically significant cardiovascular, endocrinological, neurological, respiratory, gastrointestinal disease or any disease that is considered by the investigator as a reason for exclusion. - known hypersensitivity or allergy to any component of the test product - the subject is related to any study personnel or has any other close ties or conflicts of interest with the study sponsor. - the subject has received any investigational drug or participated in a clinical trial within 4 weeks of entry to this study - current medication other than oral contraception,that is considered by the investigator as a reason for exclusion. - pregnant/lactating women at the time of recruitment will be excluded from the study - participation in another antiviral clinical trial

- no informed consent - persistent hypoxemia with spo2 < 90% despite supplemental oxygen of > 6lo2/min at screening. - patients with predominantly extrapulmonary covid-19 symptoms (e.g. gastrointestinal, neurological, etc.) - subjects who demonstrate respiratory and/or cardiac instability that is considered by the investigator as a reason for exclusion. additionally, any other clinically significant disease that could interfere with participation in the study, with the intervention being studied, or with the evaluation of symptoms. specific exclusions are asthma, immune deficiency, autoimmune disease, clinically significant cardiovascular, endocrinological, neurological, respiratory, gastrointestinal disease or any disease that is considered by the investigator as a reason for exclusion. - known hypersensitivity or allergy to any component of the test product - the subject is related to any study personnel or has any other close ties or conflicts of interest with the study sponsor. - the subject has received any investigational drug or participated in a clinical trial within 4 weeks of entry to this study - current medication other than oral contraception,that is considered by the investigator as a reason for exclusion. - pregnant/lactating women at the time of recruitment will be excluded from the study - participation in another antiviral clinical trial