Majority of mumps cases are among the vaccinated, CDC finds
14 days ago
- #mumps
- #public health
- #vaccination
- Mumps cases in the U.S. are circulating mostly among vaccinated individuals, including children.
- After the introduction of the mumps vaccine in 1967, cases dropped significantly but began rising again in 2006.
- From 2007 to 2019, one-third of mumps cases were in children and adolescents, with 94% of them vaccinated.
- Vaccinated individuals usually experience milder symptoms and fewer complications.
- Possible reasons for mumps in vaccinated people include waning immunity and lack of prior exposure to the virus.
- The mumps virus spreads through saliva or respiratory droplets, and the MMR vaccine is 88% effective.
- Recent outbreaks have been localized, but cases decreased in 2020 despite COVID-19 measures.
- Missed vaccinations during the pandemic could lead to future increases in mumps cases.
- A third dose of the MMR vaccine may be effective in stopping outbreaks, as seen on college campuses.
- Experts suggest updating the vaccine schedule to include three doses instead of two.