Rochelle Walensky, the director of the Centers for Disease Control and Prevention, said earlier this week that she expects the delta variant to become the dominant coronavirus strain in the United ...

SAN FRANCISCO (KGO) -- The Centers for Disease Control and Prevention (CDC) released new data Friday indicating the Delta variant is twice as infectious as previously thought, and a recent analysis ...

LAS VEGAS, NEVADA -- A California couple says they were fully vaccinated, but still contracted COVID-19 while on vacation as experts say breakthrough cases are possible, especially with the delta ...

Some experts are calling for people who were vaccinated with Johnson & Johnson's COVID-19 vaccine to get a booster shot of an mRNA vaccine from either Pfizer or Moderna to protect against the delta ...

The World Health Organization urged vaccinated people around the world to continue to "be appropriately cautious" when it comes to the transmission of COVID-19, especially the rising delta variant.

When the Delta variant was dominant in the United States, both vaccination and prior infection helped protect against Covid-19, but vaccination was the safest way to be protected, according to a study ...

The spread of the Delta coronavirus variant in the United States has many experts questioning whether it should be time to start testing even vaccinated people for the virus. Although health officials ...

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 ...

Since the CDC limits data reporting on breakthrough COVID-19 infections — those occurring among fully vaccinated people — to those that cause severe disease, mild or asymptomatic infections caused by ...

Add Yahoo as a preferred source to see more of our stories on Google. Jul. 13—With the Delta coronavirus variant dominant in nearly every U.S. state, veteran epidemiologist Joseph McCormick, founder ...

TEMPLE, Texas — A Central Texas man and Army veteran is fighting for his life at Baylor Scott and White Medical Center in Temple after he contracted the Delta variant of COVID-19. Longtime friend Lisa ...

The Delta variant, also referred to as a "double mutant" because it carries two mutations, is 55 per cent more transmissible ...