Officials there banned children not vaccinated against measles from public spaces last month.
"It is unacceptable to sit back and do nothing as more of our residents fall ill", county executive Ed Day said.
"Current outbreaks include the Democratic Republic of the Congo, Ethiopia, Georgia, Kazakhstan, Kyrgyzstan, Madagascar, Myanmar, Philippines, Sudan, Thailand and Ukraine, causing many deaths - mostly among young children", the United Nations body said in its report published on Monday.
It's the latest measure officials in the region have taken to combat the spread of measles.More news: 3 killed, 3 hurt in Nepal plane accident
It wasn't until vaccinations were developed and improved that the disease was declared eliminated in 2000 "thanks to a highly effective vaccination program in the United States, as well as better measles control in the Americas region", the CDC reported. It's the second largest outbreak in the U.S.in two decades.
A public health emergency has also been declared in areas of NY, ordering all residents to be vaccinated or face a fine.
The plaintiffs claim the order is unlawful because there is insufficient evidence of a measles epidemic or risky outbreak to justify extraordinary measures, such as forced vaccination or criminal penalties.
The city's board will vote on Wednesday whether to extend the emergency declaration, The Associated Press reports. The county is facing an ongoing measles outbreak, which has sickened 186, mostly children. But a group of parents sued, claiming the March 26 order "achieves no valid public purpose" and deprives children of a right to their education.More news: Trump touts tax cuts with Tax Day trip
"More than 20 million lives have been saved through measles vaccination since the year 2000 alone". It's the city's largest measles outbreak since 1991. "If anything it is now accelerating, much as we feared".
"The emergency orders grossly understate the risk of harm to children, adults and the general public from the MMR vaccine, while at the same time overstating the benefits", the lawsuit claimed, calling on the New York Supreme Court to issue a temporary restraining order to stop the Health Department.
Shortly after setting out on a cross-country charity fundraising trip last month, the man felt ill and stopped in to see two different doctors along the way, MI health authorities told The Washington Post.
A state judge overturned the order, but Rockland is appealing that decision.More news: Bruins outmuscle Maple Leafs to win Game 2