Delta Air Lines was among the major airlines to quickly drop mask requirements after a federal judge struck down a national mask mandate on airplanes and mass transit. In a statement on Monday, the ...

Researchers in France have reported the first compelling genetic evidence of a recombinant SARS-CoV-2 virus that contains elements of both the omicron coronavirus variant and the delta variant.

Packed flights, like this Delta Airlines one, will no longer require everyone wearing face masks even though Covid-19 cases have been on the upswing in the U.S. (Kent Nishimura / Los Angeles Times via ...

Yet another version of the coronavirus is getting global attention, this one dubbed AY.4.2. It appears that it could be slightly more transmissible than the Delta variant — a marginal difference that ...

Experts say it’s too soon to know how dangerous delta is compared with other variants. Vaccination rates are much higher since the early coronavirus variants emerged. Vaccination is shown to reduce ...

The highly transmissible delta variant has been officially confirmed in all 50 states as of this week, and health officials nationwide are raising alarms about localized coronavirus outbreaks as the ...

Upon first inspection, the mutations in the highly contagious delta covid variant don’t look that worrisome. For starters, delta has fewer genetic changes than earlier versions of the coronavirus.

2021 was a year of coronavirus variants. Alpha and beta kicked off the year, and several worrisome variants later, omicron is closing it out. How omicron may come to define the pandemic’s future ...

The emergence of new SARS-CoV-2 variants that can spread rapidly and undermine vaccine-induced immunity threatens the end of the COVID-19 pandemic. The delta variant (B.1.617.2) emerged in India and ...

Researchers use genomic sequencing — not the clinical tests used to diagnose patients with COVID-19 — to identify and track specific variants of the novel coronavirus, SARS-CoV-2, including the highly ...