HealthDay News — The New York City measles outbreak is over and the public health emergency that was declared on April 9 for parts of Brooklyn has ended, New York Mayor Bill de Blasio said Tuesday.

The outbreak was the largest in New York City in nearly 3 decades. Since it began in October 2018, 654 people were diagnosed with measles. There have been 52 measles-related hospitalizations and 16 admissions to intensive care due to measles complications. Most of the cases (80%) were diagnosed in people younger than 18 years, and most cases were among unvaccinated (73%) or incompletely vaccinated (7%) people or among those who did not know their vaccination status (15%). Most of the cases (72%) occurred in the Williamsburg neighborhood.

Measles outbreaks are typically declared over when 2 incubation periods for measles (42 days) have passed since the last infectious day of the last people with measles in an affected area, according to a city news release. That amount of time has passed for the people most recently infected with measles and reported to the health department. No new measles cases have been reported since mid-July.

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“Ending the measles outbreak required extensive collaboration with community organizations and Jewish leaders. They helped encourage vaccinations and achieve record immunization levels in parts of Brooklyn,” de Blasio said in the news release. “As we head back to school this week, we just remain vigilant. To keep our children and communities safe, I urge all New Yorkers to get vaccinated. It’s the best defense we have.”

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