Antiviral Agents/therapeutic use; Betacoronavirus; Coronavirus Infections/therapy; Dexamethasone/therapeutic use; Glucocorticoids/therapeutic use; Government Employees; Pneumonia, Viral/therapy; Adenosine Monophosphate/analogs & derivatives; Adenosine Monophosphate/therapeutic use; Alanine/analogs & derivatives; Alanine/therapeutic use; Antibodies, Monoclonal/therapeutic use; Antiviral Agents/adverse effects; Betacoronavirus/drug effects; Betacoronavirus/physiology; COVID-19; Coronavirus Infections/complications; Coronavirus Infections/epidemiology; Dexamethasone/adverse effects; Drug Administration Schedule; Drug Therapy, Combination; Federal Government; Glucocorticoids/adverse effects; HIV Protease Inhibitors/therapeutic use; Humans; Hypoxia/etiology; Hypoxia/therapy; Immunization, Passive; Lopinavir/therapeutic use; Oxygen Inhalation Therapy; Pandemics; Patient Acuity; Pneumonia, Viral/complications; Pneumonia, Viral/epidemiology; Risk Assessment; SARS-CoV-2; United States/epidemiology; Virus Replication/drug effects; COVID-19 Serotherapy