LOS ANGELES (KABC) -- While overall COVID-19 rates remain relatively low in Southern California amid continuing vaccination efforts, officials are increasingly worried about a growing threat from the ...

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 ...

The delta coronavirus variant surging across the United States appears to cause more severe illness and spread as easily as chickenpox, according to an internal document from the US Centers for ...

NEW YORK (WABC) -- Encouraging new data suggests the omicron variant, while highly contagious, is less severe than the delta variant. The variant has now been found in 21 states, as the U.S. continues ...

ATLANTA - EXCLUSIVE: The Centers for Disease Control and Prevention on Tuesday will announce that the delta strain of COVID-19 is a "variant of concern" in the U.S., but that two doses of the Pfizer ...

NEW YORK CITY (WABC) -- With the new more contagious delta variant of the COVID-19 virus spreading, communities with low vaccination rates are trying to get creative to get more shots into people's ...

PHILADELPHIA (WPVI) -- New numbers are shedding light on just how quickly the Delta variant of COVID-19 is spreading in the United States. The more contagious Delta variant now makes up 83% of ...

SAN FRANCISCO (KGO) -- 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 ...

Here's what infectious disease experts say about taking that summer vacation. On Monday, airlines reinstated a slew of flights between the U.S. and the U.K., as the U.K. announced its plans to reopen ...

Some parents are pushing back against New York City schools' plans to return to in-person learning Monday, since children under 12 are still ineligible for the COVID-19 vaccine. Meg Oliver spoke with ...