The CDC says some rapid flu tests are only 50-70% accurate

Doctors of the Baylor University Medical Center in Dallas aren't solely on tests but are also keeping an eye on patient symptoms.
1:28 | 02/17/18

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Transcript for The CDC says some rapid flu tests are only 50-70% accurate
Back now with the deadly flu epidemic. Tonight, new questions about just how accurate the popular quick test is in diagnosing the virus. Here's ABC's erielle reshef. Reporter: 15-year-old Kira molina, another young face of this year's deadly flu epidemic. And tonight, her death raising questions about the most common test for the virus. Kira's rapid flu test came back negative. Days later she died from flu complications. And there's 12-year-old Michael messenger who passed away just days after his negative flu test. The guilt because I'm a mom, I'm supposed to protect my kids, and I couldn't. I couldn't protect him. Reporter: The CDC says some rapid flu tests are only 50% to 70% accurate, and false negatives occur more frequently than false positives. The test will say they don't have the flu, but they do. Reporter: That's why Baylor university medical center in Dallas, one of the country's leading hospitals, says their doctors aren't relying solely on the tests and are also keeping a close eye on patient symptoms. The saying is, if it quacks like a duck, and it sounds like a duck, it's a duck. Reporter: This year's flu season striking hard. So far 84 children have died from the dangerous outbreak, 22 just in the last week. Doctors say if your child gets a rapid flu test and it comes back negative, parents still closely monitor their kids and Tom, if those kids continue to show signs of the flu, be sure to be persistent. Get back in touch with your physician. Thank you. Up next, all that glimmer isn't gold. The trials and tribulations of team usa, tonight, the medals

This transcript has been automatically generated and may not be 100% accurate.

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