Disneyland measles outbreak
The Disneyland measles outbreak began at the Disneyland Resort, California, in December 2014, and spread to seven states in the United States, Mexico, and Canada, before it was declared over in mid-April 2015. The first case of measles was reported on January 5, 2015, in an unvaccinated 11-year-old Californian resident. Between December 2014 and March 2015, 131 Californians were infected, with almost 90% of cases occurring in southern California. Linked to the California cases were 16 cases in six other US states, 159 cases in a religious group in Québec, Canada, and one case in Mexico.
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