From Jan 1 to Oct 1 of this year, the United States tracked 22 measles outbreaks and 1,249 cases, according to a new overview published today by the Centers for Disease Control and Prevention (CDC) in Morbidity and Mortality Weekly Report (MMWR).

The large number of cases nearly caused the country to lose its measles elimination status, obtained in 2000, the CDC said, and close-knit communities that eschewed the vaccine played a major role.

Fully 93% of measles cases were associated with an outbreak—defined as three or more related cases. The overview offers the most comprehensive picture of these outbreaks, and the forces that made 2019 the worst measles year the US has seen since 1992.

Credit: iStock, Manjurul

Credit: iStock, Manjurul

Three fourths of cases in Orthodox Jewish areas

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See also:

Oct 4 MMWR study

Oct 3 New York Health Commissioner statement