Vaccination is the best protection against the COVID-19 virus. We are still learning about the length of time both natural immunity (immunity the body develops after an illness) and vaccine-induced immunity for COVID-19 will last.  

People are protected best from COVID-19 when they stay up to date with their COVID-19 vaccines, which includes getting all recommended boosters when eligible. Millions of people age 5 and older are eligible to receive a booster shot and will benefit from additional protection. People who stay up to date with COVID-19 vaccinations do not have to quarantine after exposure to a person with COVID-19 as long as they remain symptom free. Check the CDC’s latest quarantine and isolation guidelines for specific details.

See additional recommendations for people who are moderately to severely immunocompromised. A second booster dose is recommended for certain people at increased risk of severe disease.