Severe Respiratory Virus Has Now Sickened Children In 16 States

The strain is not new but only a small number of labs can test for it. Since mid-August, there’s been an unusual spike in identified cases. The CDC has tested more than 200 specimens from more than 30 states. Investigators say it’s not yet clear what triggered the outbreak, but the CDC warned Wednesday that more states are likely to report confirmed cases of the infection in the coming weeks. This is because it takes time for test results to come back.

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