We are still learning about the length of time both vaccine-induced immunity for COVID-19 and natural immunity (immunity the body develops after an illness) will last. It is important to continue to wear your mask over your nose and mouth, practice social distancing (stay at least 6 feet apart), continue to frequently wash your hands and use hand sanitizer with at least 60% alcohol. More studies are needed to understand how new variants may affect the effectiveness of existing COVID-19 vaccines. For more information, visit https://www.cdc.gov/coronavirus/2019-ncov/vaccines/keythingstoknow.html.