The new cases were reported a day after New York City Mayor Bill de Blasio announced mandatory MMR vaccinations for everyone living in Brooklyn's Williamsburg neighborhood - in one of the toughest measures against an outbreak in USA history.
Lawyer Michael Sussman said Wednesday that the city overreached its authority by threatening to fine residents of four Brooklyn ZIP codes if they refuse to have their children vaccinated.
NYC announced a public health emergency because of the spread of measles over the province of Brooklyn. A state judge sided with the parents and issued a preliminary injunction against the emergency order.
The city can't legally physically force someone to get a vaccination, but officials said people who ignore the order could be fined $1,000.
But in the days that followed, parents from a private Waldorf school filed a lawsuit that called the ban "arbitrary" and "capricious". Two of the infected children developed pneumonia and had to be hospitalized as a result.
"Utahns don't need to panic, but rather carefully consider their vaccination status", she said, adding it isn't too late to get the vaccine.
America's largest urban area, New York City, has taken the extraordinary move of making vaccinations mandatory for some people who may have been exposed to the measles virus in a hard-hit, predominantly Orthodox Jewish neighborhood in Brooklyn.More news: IMF Deal for Ecuador Paved Way for Assange's Arrest
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Since October she has been fighting an uphill battle to quell one of the worst USA measles outbreaks in 20 years.
Some 285 measles cases have been identified in New York City since last fall, compared to two in all of 2017.
Most of the NY cases involved unvaccinated or incompletely vaccinated individuals, according to de Blasio's office. The first cases in Westchester occurred in other secluded Hasidic Jewish enclaves, Nitra and nearby Kasho, CBS New York reports.
"There's no question that vaccines are safe, effective and life-saving", said de Blasio.
"You will not find rabbis citing Jewish law to say people should not be vaccinated", he said, stressing that his federation, like other Jewish organizations, encourages vaccination.
It's a nightmare for public health officials, but it's good for Merck & Co., Inc.
Governor of Washington Jay Inslee also declared a state of emergency in January, urging immunization and citing the measles outbreak as "an extreme public health risk", according to a CNN article. "We have to protect our kids and our families", de Blasio said. "It's a very small minority", said Dr. Jay Begun, a pediatrician in Williamsburg. It's crucial for people to understand: The measles vaccine works. "You have a larger pool of babies". City officials said Tuesday that 246 were children. "I think it will help in getting the community covered", he said. Six of the infected children are siblings. The reasons for the explosion of cases among members of insular, ultra-orthodox communities has more to do with their frequent contacts with Israel, which is undergoing its own measles crisis, combined with their insularity and general mistrust of government, say health officials.