Measles cases are on the rise across the US, sparking questions about whether vaccinated adults need a “booster” dose to enhance protection. According to experts, most vaccinated adults don’t require another vaccine dose.
The Centers for Disease Control and Prevention (CDC) recommends two doses of the measles vaccine, given at 12-15 months and 4-6 years old. One dose is 93% effective, while two doses are 97% effective. However, Dr. Paul Offit, director of the Vaccine Education Center, suggests calling an additional shot a “dose” rather than a “booster.”
Measles vaccine effectiveness has been consistently high since its introduction in the US in 1963. A small percentage of Americans born before 1957 are presumed to have life-long immunity against measles. Those with a confirmed laboratory diagnosis of measles are protected from the virus.
In 1989, the Advisory Committee on Immunization Practices recommended children receive a second MMR dose. Offit emphasizes that anyone who has received two doses of the MMR vaccine does not need to receive another dose. If unsure about immunity, checking vaccination records or consulting a healthcare provider can help determine if an additional dose is necessary.
The CDC recently issued an alert recommending early third doses for infants in high-risk areas, but this is only recommended for those living in outbreak zones or visiting high-risk areas.
Source: https://abcnews.go.com/Health/measles-cases-rise-us-vaccine-dose/story?id=119941891