The Centers for Disease Control and Prevention listed the COVID-19 delta variant as one of its "variants of concern" (VOCs) on June 15. According to the CDC, VOCs can be more contagious, more ...

SAN JOSE, Calif. (KGO) -- As long as there is on-going COVID-19 transmission somewhere in the world, there will be new variants. That's according to infectious disease expert, Dr. Jorge Salinas with ...

SAN FRANCISCO -- A case of the coronavirus variant was detected in Southern California Wednesday, while a second suspected case has been identified in Colorado. According to officials, the COVID-19 ...

If you're a parent, you've likely received school alerts or emails saying there's been a COVID-positive case in your child's class. It's becoming a more common occurrence. "Now that school is back in ...

SAN FRANCISCO -- The R1 variant is the new strain of COVID-19 researchers are keeping a close eye on. The CDC identified "multiple spike protein mutations" in this variant. "The R.1 variant does carry ...

The mu variant is the fifth variant strain to earn the title of "variant of interest" from the WHO. Among the other variants tracked by the WHO is the delta variant — a mutant strain proven to be more ...

The World Health Organization has added the "mu" strain to its list of COVID-19 "variants of interest." The strain, also know as B.1.621, was first documented in Colombia in January 2021 but didn’t ...