Betacoronavirus/immunology, Coronavirus Infections/immunology, Pneumonia, Viral/immunology, Pandemics/prevention & control, Viral Vaccines/immunology, Immunization Programs/organization & administration, Social Isolation, Quarantine, Masks, Brazil/epidemiology, Risk Groups, Epidemiological Monitoring, Betacoronavirus/genetics, Coronavirus Infections/genetics, Pneumonia, Viral/genetics, DNA, Viral/genetics, Mutation/genetics, COVID-19