Coronavirus Infections/epidemiology, Pneumonia, Viral/epidemiology, Pandemics/statistics & numerical data, Americas/epidemiology, Epidemiological Monitoring, Health Systems/organization & administration, Betacoronavirus/immunology, Coronavirus Infections/immunology, Pneumonia, Viral/immunology, Viral Vaccines/immunology, Mass Vaccination/organization & administration, Clinical Trial Protocol, Risk Groups, Vulnerable Populations, Health Personnel/organization & administration, Communication, Social Isolation, Quarantine/organization & administration, Masks, COVID-19, Etienne, Carissa F, Covax