Most cases of measles in the United States stem from someone who isn't protected by the vaccine traveling overseas, according to the CDC. They believe the outbreaks are due to people traveling to other countries with significant outbreaks, including Israel, the Philippines and Ukraine, and then coming back to the USA and infecting people in areas with low vaccination rates.
A series of measles cases in the United States has led to fear and uncertainty in some communities, as well as quarantines at sea and at universities. "Not just to protect our own children, but also, even more importantly, to protect infants and children of others - our friends and neighbors who are too young to be immunized, or have lost their immunity due to other diseases", Joseph Miner, executive director of the Utah Department of Health told The Salt Lake Tribune.
"Is it right to expose a group of people - and particularly those who can't have the vaccine such as babies - to these diseases as a effect of people not being vaccinated?" he asked. This is the highest number of cases in the country in a single year since 1994 when 963 cases of measles occurred. Measles is highly contagious and spreads through coughing and sneezing, according to the CDC.
State legislatures in New York, New Jersey, Oregon, Vermont, Minnesota and Iowa, are looking at similar bills, that would only allow exemptions from vaccinations for medical reasons as determined by the child's doctor.
Almost 50 people have been diagnosed with the disease in Ireland already this year - with a much larger increase globally.
"She got sick because of the negligence of other parents who choose not to vaccinate their children", Peine said.
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If you have travelled and fallen unwell with fever and body rash, it is important to inform your healthcare professional of your travel history.
I know I was vaccinated. Some people may develop blue-white spots on the insides of their mouths.
Giving a vaccine while the antibodies are still circulating will decrease the effectiveness of the shot, which is why immunization isn't recommended until later. Some of them triggered United States outbreaks, mostly among unvaccinated people; that includes the largest outbreaks, in Orthodox Jewish communities in and around New York City.
And, infants ages 6 to 11 months should also receive a dose of a measles vaccine before traveling internationally, since various countries are reporting extensive measles outbreaks.
When the CDC and other public health authorities are called to investigate possible transmission on aircraft, they try to figure out who may have had contact with the infected person - including people who may have been sitting nearby.
Currently, an outbreak of mumps is underway in central Utah with 13 cases reported since the beginning of the year.