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 best protected from COVID-19, especially severe illness or hospitalization, when they stay up to date with their COVID-19 vaccines, which includes getting all recommended boosters when eligible. Millions of people 6 months and older are eligible to receive a booster shot and will benefit from additional protection.
See additional recommendations for people who are moderately to severely immunocompromised. The recommended vaccination schedule from the Centers for Disease Control and Prevention is available here.