Betacoronavirus/genetics, Mutation/genetics, DNA, Viral/genetics, Coronavirus Infections/genetics, Pneumonia, Viral/genetics, Health Systems/organization & administration, Mental Health, Quarantine/organization & administration, Coronavirus Infections/epidemiology, Pneumonia, Viral/epidemiology, Social Isolation, Risk Groups, Epidemiological Monitoring, Betacoronavirus/immunology, Coronavirus Infections/immunology, Pneumonia, Viral/immunology, Pandemics/prevention & control, Viral Vaccines/immunology, Health Promotion, Public Sector/economics, COVID-19, Ghebreyesus, Tedros Adhanom , Covax