2? Dr. Leana Wen: Since the start of Covid-19, we have been discussing new variants. The original strain of the virus was ...

When COVID-19 vaccines rolled out, public health officials largely followed a simple logic: protect the most vulnerable first ...

With the rise of omicron came the fall of long-lasting protection from reinfection with the pandemic coronavirus SARS-CoV-2, ...

A new COVID-19 variant, XEC, has been making headlines as cases continue to rise worldwide. The latest strain, identified as ...

As South Korea battled a spike in flu cases, misinformation swirled online that the country was suffering a resurgence of the Omicron XBB coronavirus variant, which was "five times stronger" and "more ...

The Omicron variant of the coronavirus is suspected to be the most infectious yet by binding to human receptors better than the Delta variant and the team’s findings show it may have the potential to ...

Infection with the SARS-CoV-2 Omicron variant confers weak, short-term protection against reinfection, compared with the much ...

A new coronavirus descendant that is related to the Delta variant—also known as Delta plus or formally AY.4.2—may spread more easily than the regular Delta strain, according to experts in ...

School closures reduced the impact of COVID-19 in most countries but had negative effects in some, Monash University-led ...

The COVID-19 pandemic, caused by the coronavirus ... So far there have been several variants of the virus -- B.1.1.7, B.1.351, P.1, Delta, B.1.617.2, BA.5. Omicron BF.7 strain is driving the ...