Small measles outbreaks have been reported in multiple regions over the last few months, but on Monday the Centers for Disease Control and Prevention reported those collective cases have set a record for a new national high.
In 2014, there were 667 cases for the entire year.
Measles cases in the United States are the highest they've been 25 years and expected to continue to rise.
Thirteen outbreaks-defined as three more related cases-have now been reported in 2019 so far, and account for 94% of all cases. Individual outbreaks have popped up in a number of states including New York, Michigan, New Jersey, California, Oregon, Georgia, and Maryland, but that doesn't even begin to reveal the true scope of the problem.
Some of those cases are listed below.
You can find out if you need a measles booster by checking your vaccination record. That includes the largest outbreaks, in Orthodox Jewish communities in and around New York City.
New York City officials have closed two religious Jewish schools in Brooklyn for failing to comply with Health Department orders regarding the measles outbreak.
Public Health England figures show that between April 2010 and December 2018, a total of 23,024 children in the Black Country - Wolverhampton, Walsall, Sandwell and Dudley - were not fully protected against the measles virus. As of April 28, 21,284 doses of the MMR (measles, mumps, rubella) vaccine have been administered to people who are under 19 years old in Williamsburg and Borough Park since October.
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It said that vaccination rates are plummeting, with inaccurate and misleading anti-vaccination messages on social media thought to be among the reasons.
Pennsylvania is above that rate, according to the Department of Health, so the disease has not been gaining a foothold in the state. "We've had people coming in on a daily basis asking and we've actually been looking at the literature trying to determine what's the best course of action here. One dose is about 93% effective".
Remember, it was just two years ago there were 75 confirmed measles cases in Minnesota. Measles is so contagious that if one person has it, 90 percent of the people close to that person who are not immune will also become infected. Most of the affected had never been vaccinated.
Mattson needed to be vaccinated for her job and took a blood test to see if she is immune to measles.
Knowing these numbers is great, but what does this mean as we look ahead?
It's important to know that the majority of people who have contracted the measles have not been vaccinated, according to the CDC, and that the disease can spread when it reaches a community where groups of people aren't vaccinated.
In Dudley, it was 1,127 children who had not received their first MMR vaccination by the age of five, and a further 1,613 failed to have the second injection. They worry unvaccinated people will pick up the elsewhere and bring it back to the U.S.
So what do we do? "But because of the current situation globally, if infants were to travel, we recommend in their 6 months to 11 months before they would get their 12-month shot, we recommend those infants do get a dose of the MMR vaccine prior to travel". The recommended two doses of the measles, mumps and rubella vaccine is 97 percent effective in a given person in preventing measles.