Mumps cases continue to circulate in the U.S., largely among vaccinated people, including children, CDC finds.
Cases of mumps, once a common childhood illness, declined by more than 99 percent in the U.S. after a vaccine against the highly contagious respiratory infection was developed in 1967. Cases dropped to just 231 in 2003, down from more than 152,000 in 1968. But cases began climbing again in 2006, when 6,584 were reported, most of them in vaccinated people.
“Before that, large outbreaks of mumps among people who were fully vaccinated were not common, including among vaccinated children,” said Mariel Marlow, an epidemiologist at the CDC who led the new study. “But the disease symptoms are usually milder and complications are less frequent in vaccinated people.”
The mumps virus is spread through direct contact with saliva or respiratory droplets from the mouth, the nose or the throat of an infected person. An infected person can spread the virus by coughing, sneezing, talking or sharing drinks or during close-contact activities, such as sports. Nearly
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