Adults Hit Hard by Measles Surge: Are You Protected?

Measles cases have reached a concerning 30-year high across the United States, with a significant portion of infections now affecting adults. Approximately 38% to 40% of measles cases this year have been documented in adults, a trend that saw adults make up just over half of all measles hospitalizations in 2025. This highly contagious disease, which can lead to severe complications like pneumonia and brain swelling, disproportionately impacts unvaccinated individuals.

For those uncertain about their measles vaccination status, experts recommend consulting state immunization registries or healthcare providers. Lifelong immunity is typically achieved with two doses of the measles, mumps, and rubella (MMR) vaccine, which is highly effective. If records are unavailable, or if one received the vaccine between 1963 and 1967, getting an additional MMR dose is considered safe and advisable.

Individuals born before 1957 are generally considered immune due to widespread exposure before the vaccine. However, adults who received the vaccine during a less effective period (1963-1967) may need a booster. In cases of exposure, prompt medical intervention with the measles vaccine or immunoglobulin can provide protection.