Subject(s)

Coronavirus Infections , Influenza, Human , Pandemics , Pneumonia, Viral , Australia , Betacoronavirus , COVID-19 , Chile , Coronavirus Infections/epidemiology , Humans , Influenza, Human/epidemiology , Influenza, Human/prevention & control , Pandemics/prevention & control , SARS-CoV-2 , South Africa , United States