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The U.S. has now reported more than 800 measles cases in at least two dozen states. The vast majority of cases — more than 600 — are in Texas. In the midst of the outbreak, a 

 shows how much misinformation people are seeing about measles.

The good news is the vast majority of people still have 

, director of public opinion and survey research at KFF, a nonprofit health policy research organization which conducted the poll.

The bad news: People are being exposed to a lot of

— and many don't know what to make of it.

"What we have seen is that a large share of people are at least somewhat uncertain about how to evaluate that misinformation," Hamel says.

The survey was conducted earlier in April and included a nationally representative sample of 1,380 adults. Pollsters asked respondents about three false claims: that the measles vaccine is more dangerous than getting the disease; that the vaccine causes autism in children, and that vitamin A can prevent a measles infection. None of these things are true.

Only 5 percent of adults polled said they thought these falsehoods were definitely true, and a much larger share of respondents said they were "probably false" — but they weren't completely confident that these were falsehoods. Hamel says that shows there's a large group of people out there whose views on measles have room for uncertainty.

And a significant proportion leaned toward saying these false claims about measles are probably true. For example, 1 in 4 adults polled said vitamin A either probably or definitely prevents measles. And 19 percent believed it was probably or definitely true that the measles, mumps and rubella vaccine is more dangerous than getting infected with measles.

The poll also found a clear political divide. 

"We see that Republicans are much more likely than Democrats to lean towards believing this misinformation about measles," Hamel says. "And that's true among parents as well."

Most parents in the poll said they do keep their children up to date on their recommended vaccines.

But among parents who said that at least one of these false claims was probably or definitely true, 1 in 4 said they'd either skipped or delayed some recommended vaccines for their kids.

"Those parents are more than twice as likely to say that they have delayed or skipped some vaccines for their children compared to parents who don't believe any of those claims," Hamel says, adding, "I think this is one of the more concerning findings from the poll."

Hamel says one big takeaway is that in a world where people are bombarded with health information — and misinformation — on all kinds of media platforms, they don't always know how to evaluate what they're hearing or reading or who to trust.

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Maria Godoy

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With the U.S. now reporting more than 800 measles cases, a new poll from health policy research group KFF finds that many people are being exposed to false claims about measles and the measles vaccine.

Like measles, misinformation is spreading, poll finds

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