Betacoronavirus, Pneumonia, Viral/prevention & control, Coronavirus Infections/prevention & control, Pandemics/prevention & control, Quarantine/organization & administration, Social Isolation, Coronavirus Infections/epidemiology, Americas/epidemiology, Dexamethasone/therapeutic use, Polymerase Chain Reaction/methods, Personal Protective Equipment/supply & distribution, Vaccination Coverage/organization & administration, Coronavirus Infections/drug therapy, Risk Groups, Local Health Systems/organization & administration, Tropical Medicine/organization & administration, Hemorrhagic Fever, Ebola/prevention & control, COVID-19, Ghebreyesus, Tedros Adhanom