A Negative Covid Test Doesn’t Rule out Long Covid, Study Finds

A new study of a small group of long Covid patients suggests that millions of people who never tested positive for Covid may nonetheless have the often debilitating constellation of symptoms that follow an initial infection. Researchers tested 29 long Covid patients who never tested positive and found 41% to have T cell or antibody responses to the virus — meaning they had indeed been infected. 

“We estimated that there were approximately 10 million people in the first year of the pandemic in the U.S. who are in this predicament: who got Covid, got long Covid, but tested negative for Covid,” said Northwestern Medicine’s Igor Koralnik, who led the study. Read the article from STAT News here.