As the virus continues to mutate, scientific advisers to the C.D.C. are urging Americans to roll up their sleeves again for annual vaccinations.As the virus continues to mutate, scientific advisers to the C.D.C. are urging Americans to roll up their sleeves again for annual vaccinations.Read Moreyour-feed-science, Vaccination and Immunization, Drugs (Pharmaceuticals), Coronavirus (2019-nCoV), Disease Rates, Guillain-Barre Syndrome, Elderly, Hospitals, Deaths (Fatalities), Viruses, Research, Children and Childhood, Advisory Committee on Immunization Practices, Centers for Disease Control and PreventionNYT > Health