SAN FRANCISCO (KGO) -- On Dec. 31, UCSF'S Dr. Charles Chiu and his colleagues were in a lab when they found what they are calling"L-452R," a California variant of COVID-19. "We actually discovered ...

"It's the biggest experiment that's ever happened." In a stunningly short period of time, the delta variant has changed the course of the COVID-19 pandemic by evolving to become more transmissible ...

The delta variant is fueling the COVID-19 surge in the United States, but experts warn that a more dangerous variant could emerge if more Americans don't get vaccinated. Delta is the most recent of ...

A variant strain of the coronavirus, one that was first discovered in the United Kingdom, is now the dominant strain of the virus circulating throughout the United States, CDC Director Rochelle ...

A seasonal flu virus suddenly mutated in the summer. It appears to evade some of our immunity, has kick-started a flu season ...

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 ...

Post-pandemic amnesia is a natural reaction, and it’s common for misremembering to occur after a pandemic or collective traumatic event occurs. Yet the reality is that SARS-CoV-2, the virus causing ...

Four theories could explain the variants' ability to jump from person to person. In recent months, new variants of the virus that causes COVID-19 have been popping up all over the world, and experts ...

DURHAM, N.C. (WTVD) -- COVID-19 remains a threat to public health, and the people on the frontlines of prevention have advice for everyone who's worried. ABC11 heard from experts associated with Duke ...

A more severe type of flu is set to wreak havoc on the NHS this winter, with infections circulating at a rate not typically ...