We may not know what animal SARS-CoV-2 came from, but similar viruses circulate in bats.
People who are fully vaccinated against COVID-19 in the U.S. are strongly protected against the delta variant of the coronavirus, and do not need booster shots yet, according to experts.
Poop transplants may have helped two patients with risk factors avoid severe COVID-19, a new case report suggests.
So far, lambda has been detected in 29 countries, with high levels of spread in South American countries.
The Johnson & Johnson COVID-19 vaccine is highly effective against the highly transmissible delta variant, the company announced.
The mRNA vaccines will likely provide protection against the coronavirus for years if it doesn't evolve significantly, a small new study suggests.
Most countries that host laboratories dealing with the deadliest pathogens score low on measures of biosecurity and biosafety.
A highly transmissible SARS-CoV-2 variant called "delta" has spread to nearly 100 countries around the world, including to the U.S., where it's likely to soon become the dominant variant.
A researcher in Seattle has dug up deleted files from Google Cloud that reveal 13 partial genetic sequences for some of the earliest cases of COVID-19 in Wuhan.
If all the circulating SARS-CoV-2 particles were gathered together into one place, they would weigh somewhere between the weight of an apple and that of a young toddler.
Researchers in Israel say they've found a possible link between the Pfizer-BioNTech COVID-19 vaccine and cases of heart inflammation called myocarditis in young men.