What researchers know — and don't — about long Covid

There is no test for long Covid, and the CDC and the medical community have no official definition. But health care workers across the country are diagnosing patients who have previously contracted Covid-19 based on a wide-ranging set of symptoms. A CDC study released May 27 said that one in five adults in the U.S. may develop the condition — but there are still more questions than answers. Erin Banco reports. Learn more about your ad choices. Visit megaphone.fm/adchoices