Mexico's Ministry of Health has issued a travel alert to the United States after a Mexican was infected with measles while visiting New York.
By Friday afternoon, two days after Los Angeles County ordered the precautions, about 325 of those affected had been cleared to return after proving their immunity to the disease, through either medical records or tests, health officials said.
A total of 555 cases of measles have been recorded in the United States since January 1 with an Orthodox Jewish community in New York City being hardest hit who were infected by visitors from Israel, where a measles outbreak began a year ago.
The World Health Organization (WHO) has reported that global measles cases have nearly quadrupled in the first quarter of 2019 to 112,163 cases compared to the same period last year.
Resistance to vaccination against the infectious disease and malnutrition are seen as the major contributors towards the largest measles outbreak in the island nation's history.
New York City Mayor declared a public health emergency to fight against a measles outbreak affecting the Orthodox Jewish community and ordered mandatory vaccinations in several neighbourhoods.
Measles was declared officially eliminated from Australia by the World Health Organisation in 2014. But the growing anti-vaccine movement has seen a reemergence of the disease in developed nations including Australia.
Pakistan, Afghanistan and Nigeria, are the only other countries that suffer from endemic polio, a childhood virus that can cause paralysis or death.
The number of people getting vaccinated in Romania has fallen faster than anywhere in the world and now more than 12,000 are infected with the measles virus across the country.
In Europe, there were more than 21,000 cases of measles and 35 deaths last year, a fourfold increase in cases compared to the previous year.
The World Health Organization reports the number of people who contracted measles in Europe in 2017 was four times higher than the year before.
Large measles outbreaks still inflict parts of Europe, where some people don't get vaccinated.
Subscribe to our Youtube channel for all latest in-depth, on the ground reporting from around the world.
Copyright © 2019 TRT World.