Potential Measles Exposures in DC Region

There are currently no measles exposures that we are monitoring at this time.

If you are notified that you may have been exposed to measles, you should monitor for signs/symptoms of measles for 21 days (3 weeks) after the last exposure, especially if you:

  • are not fully vaccinated or otherwise immune to measles  -OR-
  • have an unknown measles vaccine history -OR-
  • only received a single measles vaccine in the 1960's without documentation of receiving a LIVE measles vaccine

People are generally considered immune to measles if they are up to date on measles vaccination, have had a laboratory confirm they either had measles during their lifetime or are immune to measles, or were born before 1957.

[Last Updated July 11, 2025]