The XFG COVID-19 variant, aka "Stratus," is spreading rapidly in the U.S. as cases rise. Here's what to know about symptoms ...

DURHAM, N.C. -- A pet dog tested positive for COVID-19 in North Carolina, in what researchers say is the first known novel coronavirus case in a canine.

NEW YORK -- A family from Staten Island described the last days of their dog, the first pet canine in the U.S. to test positive for COVID-19, in an exclusive interview with National Geographic.

It took about a year for researchers to develop a reliable, at-home self-test for COVID-19 after the virus was identified. Heather Junqueira, the founder of BIO-K9, says a scent-trained dog can be ...