The Centers for Disease Control and Prevention (CDC) reports that nearly three dozen cases of measles this year have been in people who received two doses of the measles vaccine. This means about 3% of confirmed measles infections were in fully vaccinated individuals.
According to the CDC, nearly 1,200 measles infections have been reported so far in 2025, with many cases occurring in Texas and Colorado. In Texas, 21 confirmed cases have been linked to individuals with at least two doses of the vaccine.
Despite vaccination, the virus has spread rapidly due to travel and exposure. The CDC recommends that people exposed to measles be vaccinated within 72 hours if they are not fully immunized. Experts warn that a booster shot may be necessary for some seniors who received less effective vaccines in the past.
The CDC also issued guidance for summer camps to prepare for the threat of measles spread, emphasizing the importance of checking staff and child immunity documentation. Measles vaccines have been proven 97% effective after two doses and 93% after one dose.
As the US approaches the highest number of measles cases since 2019, authorities are tracking outbreaks linked to international travel and within the country. With summer travel season approaching, experts urge caution and vaccination reminders for all individuals, particularly those with weakened immunity.
Source: https://www.cbsnews.com/news/measles-cases-fully-vaccinated-3-percent-cdc