NEW YORK, April 24 (Reuters) – New York City has issued civil summonses to 12 people it said were not complying with a mandatory measles vaccination order as the number of recorded cases in the city’s worst outbreak since 1991 rose to 390, according to data released on Wednesday.

The city’s outbreak of the highly contagious and sometimes deadly virus began last October and has been largely confined to children in Orthodox Jewish communities in Brooklyn.

Two of the 61 additional cases confirmed since Thursday are in pregnant women, the city’s Health Department said in a statement.

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