Differing strains of the coronavirus continue to appear around the world and a new COVID-19 variant, the so-called "Delta" variant, has health experts concerned. The variant, otherwise known as B.1617 ...

The fast-spreading delta variant of the coronavirus has been gaining traction worldwide since it was first detected in India. It’s a version of the coronavirus that has been found in more than 80 ...

The delta variant has emerged as the dominant strain of the novel coronavirus in the United States, according to updated data from the Centers for Disease Control and Prevention (CDC). The CDC’s ...

With the CDC estimating that the delta variant accounts for more than 90% of new COVID cases in the U.S., scientists are still learning more about what makes this variant different from prior versions ...

LONDON — Since the start of the coronavirus pandemic, the U.S. has been keeping a close eye on the U.K. Stream NBC 5 for free, 24/7, wherever you are. From its initial response to Covid-19 (questioned ...

One thing we know for sure about SARS-CoV-2, the virus that causes COVID-19, is that it keeps changing. Since the start of the pandemic, we have seen several notable variants, including Alpha, Beta, ...

ATLANTA, Ga. — The delta variant that’s now the dominant strain of coronavirus in the U.S. appears to be as transmissible as chickenpox, according to an internal document from the Centers for Disease ...

The Delta variant is expected to eclipse the Alpha variant in the next couple weeks, which worries health officials, said Rochelle Walensky, director of the Centers for Disease Control and Prevention.

Moderna on Tuesday released preliminary data indicating its vaccine is likely to hold up against several variants of concern, including the Delta variant, which is predicted to become the dominant ...