Why do some people seem unable to catch COVID? Scientists are looking for answers. - USA TODAY

Scientists are studying people intentionally exposed to the virus that causes COVID and those who don't get sick to find out why some avoid infection.

One of the lingering mysteries of the COVID-19 pandemic is why some people get infected without getting sick and others don't get infected at all, despite exposure. Beyond a few known risk factors, … [+10354 chars]

full article...