USA Today – An otherwise healthy 25-year-old Nevada man is the first American confirmed to have caught COVID-19 twice, with the second infection worse than the first. He has recovered, but his case raises questions about how long people are protected after being infected with the coronavirus that causes the disease, and potentially how protective a vaccine might be.

“It’s a yellow caution light,” said Dr. William Schaffner…

More at USA Today





Comments are closed.

 

 


hey