A person is considered up to date once they have received all dose(s) recommended for their age group. Check your local COVID-19 Community Level for recommendations on when to wear a mask indoors and additional precautions you can take to protect yourself from COVID-19. If you are immunocompromised or more likely to get very sick from COVID-19, learn more about how to protect yourself. Layered prevention strategies — like staying up to date on vaccines and wearing masks — can help prevent severe illness and reduce the potential for strain on the healthcare system.