Betacoronavirus/drug effects, Pneumonia, Viral/prevention & control, Coronavirus Infections/prevention & control, Pandemics/prevention & control, Vaccines/supply & distribution, Mass Vaccination/organization & administration, Immunization Programs/organization & administration, Disease Outbreaks/prevention & control, Child Health, Immunization Schedule, BCG Vaccine/therapeutic use, Influenza Vaccines/therapeutic use, Health of the Elderly, Viral Vaccines/analysis, Coronavirus Infections/drug therapy, Pneumonia, Viral/drug therapy, Quarantine/organization & administration, Health Systems/organization & administration, Pan American Health Organization, Health Communication, COVID-19