The coronavirus most likely first appeared in humans after jumping from an animal, a team of international and Chinese scientists looking for the origins of COVID-19 said Tuesday, saying an alternate theory that the virus leaked from a Chinese lab was unlikely.
Evidence is mounting that having COVID-19 may not protect against getting infected again with some of the new variants. People also can get second infections with earlier versions of the coronavirus if they mounted a weak defense the first time, new research suggests.
Despite its world-class medical system and its vaunted Centers for Disease Control and Prevention, the U.S. fell behind in the race to detect dangerous coronavirus mutations. And it's only now beginning to catch up.
Pressure is building on school systems around the U.S. to reopen classrooms to students who have been learning online for nearly a year, pitting politicians against teachers who have yet to be vaccinated against COVID-19.
The U.S. Department of Veterans Affairs (VA) reached a milestone in just a month and a half’s time administering 1 million doses of the COVID-19 vaccine to Veterans and VA health care workers.