
Measles Booster: Who Should Consider an Extra MMR Dose
Measles cases are climbing in 2026 (about 2,777 confirmed across 47 states as of Aug 20, with 2 deaths in PA), but the MMR vaccine remains highly protective. There is no separate routine “measles booster” for healthy, fully vaccinated adults; an extra MMR dose is simply a second shot given to those who may not have completed the two-dose schedule or fall into higher-risk groups. Most people don’t need a booster, but those who may benefit include individuals who received the older inactivated measles vaccine (1963–1967), and people born before 1989 who are at higher risk (international travel, healthcare work, students, or outbreak areas). If you’re unsure of your vaccination history, you can get a booster or test for immunity, though a negative titer doesn’t rule out protection. Get a booster through your primary care physician, a pharmacy, or local health department; the extra dose is safe even if you’re already immune.













