![]() ![]() High vaccination coverage helps limit the size, duration, and spread of mumps outbreaks. Large outbreaks are more likely to occur in close-contact settings. communities of people who previously had 1 or 2 doses of MMR vaccine. Large outbreaks have happened in settings where people have intense or frequent close contact, like college campuses, close-knit communities, and large gatherings. ![]() Most of these cases were in young adults and people who were vaccinated. However, mumps cases and outbreaks reported in the United States have increased since 2006. in 1967 and children regularly received two doses of MMR vaccine. Reported cases decreased by more than 99% after both the mumps vaccination program started in the U.S. Before mumps vaccine was available in the United States, most children got mumps by the time they reached adolescence. ![]()
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