inclusion criteria: * males and females 18 years of age or older at the time of signing of the informed consent form (icf). * hospitalized with evidence of covid-19 pneumonia defined as: 1. severe acute respiratory syndrome coronavirus-2 (sars-cov-2) infection documented with polymerase chain reaction (pcr) of any specimen; e.g. respiratory, blood, urine, stool, other body fluid 2. presence of respiratory distress as indicated by peripheral capillary oxygen saturation (spo2) lesser than or equal to (=\<) 93 percent (%) on room air or respiratory rate greater than or equal to (\>=) 30 breaths per minute (breaths/min). * the participant (or a legally acceptable representative) has provided written informed consent approved by the institutional review board (irb)/ independent ethics committee (iec) before any study-specific procedures are performed. * agree to adhere to the protocol-defined schedule of treatments, assessments, and procedures.

inclusion criteria: * males and females 18 years of age or older at the time of signing of the informed consent form (icf). * hospitalized with evidence of covid-19 pneumonia defined as: 1. severe acute respiratory syndrome coronavirus-2 (sars-cov-2) infection documented with polymerase chain reaction (pcr) of any specimen; e.g. respiratory, blood, urine, stool, other body fluid 2. presence of respiratory distress as indicated by peripheral capillary oxygen saturation (spo2) lesser than or equal to (=\<) 93 percent (%) on room air or respiratory rate greater than or equal to (\>=) 30 breaths per minute (breaths/min). * the participant (or a legally acceptable representative) has provided written informed consent approved by the institutional review board (irb)/ independent ethics committee (iec) before any study-specific procedures are performed. * agree to adhere to the protocol-defined schedule of treatments, assessments, and procedures.

inclusion criteria: males and females 18 years of age or older at the time of signing of the informed consent form (icf). hospitalized with evidence of covid-19 pneumonia defined as: severe acute respiratory syndrome coronavirus-2 (sars-cov-2) infection documented with polymerase chain reaction (pcr) of any specimen; e.g. respiratory, blood, urine, stool, other body fluid presence of respiratory distress as indicated by peripheral capillary oxygen saturation (spo2) lesser than or equal to (=<) 93 percent (%) on room air or respiratory rate greater than or equal to (>=) 30 breaths per minute (breaths/min). the participant (or a legally acceptable representative) has provided written informed consent approved by the institutional review board (irb)/ independent ethics committee (iec) before any study-specific procedures are performed. agree to adhere to the protocol-defined schedule of treatments, assessments, and procedures.

inclusion criteria: males and females 18 years of age or older at the time of signing of the informed consent form (icf). hospitalized with evidence of covid-19 pneumonia defined as: severe acute respiratory syndrome coronavirus-2 (sars-cov-2) infection documented with polymerase chain reaction (pcr) of any specimen; e.g. respiratory, blood, urine, stool, other body fluid presence of respiratory distress as indicated by peripheral capillary oxygen saturation (spo2) lesser than or equal to (=<) 93 percent (%) on room air or respiratory rate greater than or equal to (>=) 30 breaths per minute (breaths/min). the participant (or a legally acceptable representative) has provided written informed consent approved by the institutional review board (irb)/ independent ethics committee (iec) before any study-specific procedures are performed. agree to adhere to the protocol-defined schedule of treatments, assessments, and procedures.

inclusion criteria: - males and females 18 years of age or older at the time of signing of the informed consent form (icf). - hospitalized with evidence of covid-19 pneumonia defined as: 1. severe acute respiratory syndrome coronavirus-2 (sars-cov-2) infection documented with polymerase chain reaction (pcr) of any specimen; e.g. respiratory, blood, urine, stool, other body fluid 2. presence of respiratory distress as indicated by peripheral capillary oxygen saturation (spo2) lesser than or equal to (=<) 93 percent (%) on room air or respiratory rate greater than or equal to (>=) 30 breaths per minute (breaths/min). - the participant (or a legally acceptable representative) has provided written informed consent approved by the institutional review board (irb)/ independent ethics committee (iec) before any study-specific procedures are performed. - agree to adhere to the protocol-defined schedule of treatments, assessments, and procedures.

inclusion criteria: - males and females 18 years of age or older at the time of signing of the informed consent form (icf). - hospitalized with evidence of covid-19 pneumonia defined as: 1. severe acute respiratory syndrome coronavirus-2 (sars-cov-2) infection documented with polymerase chain reaction (pcr) of any specimen; e.g. respiratory, blood, urine, stool, other body fluid 2. presence of respiratory distress as indicated by peripheral capillary oxygen saturation (spo2) lesser than or equal to (=<) 93 percent (%) on room air or respiratory rate greater than or equal to (>=) 30 breaths per minute (breaths/min). - the participant (or a legally acceptable representative) has provided written informed consent approved by the institutional review board (irb)/ independent ethics committee (iec) before any study-specific procedures are performed. - agree to adhere to the protocol-defined schedule of treatments, assessments, and procedures.