Although data from a recent case has not been disclosed, the CDC reports that of the nearly 3% of other infected people who were fully vaccinated, not one was hospitalized. A double dose of the measles vaccine is 97% effective at preventing the disease. [KFF Health News and CBS}

At least 3% of measles cases confirmed so far this year have been in people who received two doses of the measles vaccine, meaning they were fully vaccinated, the Centers for Disease Control and Prevention says. 

About three dozen of the nearly 1,200 measles infections in 2025 have been in people with two vaccine doses, the agency said Friday in its weekly update on cases. An additional 2% of cases were in people who received at least one dose of the measles vaccine.

Many of the cases were in Texas, which on Tuesday counted a 21st confirmed measles case in someone with at least two doses of the vaccine.

Lara Anton, a spokesperson for the Texas Department of State Health Services, said Monday that their first 20 cases were in children 8 years old or younger. Anton did not immediately respond to a request for more information about the additional case, which was reported on Tuesday.

A CDC spokesperson said in an email their data reflects vaccination status at the time someone was exposed to the virus. This means none of the 36 vaccinated cases they confirmed Friday received their second dose as a result of post-exposure prophylaxis. Post-exposure prophylaxis is offering someone a drug or vaccine after they are exposed to a germ, to reduce the chance they will be infected or develop severe disease.

Check out an IOMC webinar on vaccines here>https://youtu.be/aFpSP-224QU?feature=shared

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