Measles outbreak spreads, doctors blame lack of vaccinations - KWWL - Eastern Iowa Breaking News, Weather, Closings

Measles outbreak spreads, doctors blame lack of vaccinations

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A measles outbreak has infected at least 50 people, starting at California's Disneyland and spreading to several Utah, Colorado and Washington state.

Doctors tell NBC News, many of the sick patients were not vaccinated, either because they were too young or because their parents refused to get them vaccinated.

Health experts say a decrease in vaccination rates is the main reason the nation has seen a marked increase in measles outbreaks in recent years. More than 600 people were infected in the U.S. in 2014—making it the worst year for measles in more than a decade.

Thirteen people are also sick in a separate measles outbreak in South Dakota.

Older adults may also want to talk to your doctor about immunity to the measles. Doctors say those born in the 1970's or 1980's may need a second round of shots for full immunity because they may not have received a booster shot that was later added to the vaccine schedule. Those born in the 60's might need a booster depending on which vaccine they received as children. Those born before 1957 may not need a measles vaccination because they've likely already been exposed and may be immune.

Experts say, it's best to check with your doctor. Measles immunity can be checked with a blood test.

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