According to data released by the World Health Organisation, the number of cases of measles tripled worldwide in the first three months of 2019, compared to the same period past year.
The agency said that measles was "almost entirely preventable through two doses of a safe and effective vaccine".
The recent measles outbreak in the United States also showed that vaccine resistance is seen more in the relatively rich. In comparison past year, during the same period 28,124 cases were reported.
Salmon said he was less concerned about mass infection in the United States, and particularly Maryland, because vaccination rates are higher.
Ninety percent of unvaccinated or nonimmune people who come into contact with someone with measles will become infected, Palacio noted.
Five parents in New York City (NYC) on Monday filed a lawsuit against the New York City Department of Health and Mental Hygiene over the recent emergency vaccination order, saying the order lacks sufficient evidence of the measles outbreak and violates legal religious exemptions.
Measles is a highly infectious viral illness that can lead to serious health complications - including infections of the lungs and brain - and even death.
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Symptoms usually appear 10 to 12 days after exposure to measles, and in some cases, symptoms can start as early as seven days or as late as 21 days following exposure.
"We are seeing trends that show that where people are not vaccinating, that's where the majority of measles cases are", Parrish said.
The largest increase was in Africa with a 700 per cent rise in cases.
County Attorney Thomas Humbach said the county is prepared to make their case and has already submitted the paperwork for the appeal which will be heard on Thursday, April 18, by the Appellate Division. Generally, people who've received two doses of MMR are considered protected for life, meaning they don't need a booster shot, according to the CDC.
As a result, the number of cases of whooping cough fell more than 90 per cent from 1.97 million cases in 1980 to nearly 144,000 cases in 2017.
Venezuela, where the disease was once contained, has also seen tens of thousands of cases as the country's economic and political crises continue to push the healthcare system to the brink of collapse.