Do You Need Another Dose of the MMR Vaccine? By Vincent Iannelli, MD / April 27, 2019 / 1957, 1963, 1967, 1990, booster doses, measles outbreaks, MMR, natural immunity, third dose of MMR, titer testing, travel vaccines Have you had two doses of MMR? Share this:TweetPrintEmailShare on TumblrWhatsAppLike this:Like Loading...