Some viruses mutate more rapidly than others. Learn more about why that is and what that means for your health.

SARS‑CoV‑2, the virus that causes COVID-19, continues to mutate, with some newer strains becoming less responsive to current ...

Five years ago, a cluster of people in Wuhan, China, fell sick with a virus never before seen in the world.The germ didn't have a name, nor did the illness it would cause. It wound up setting off a ...

SARS-CoV-2, the virus responsible for COVID-19, is widespread among wildlife species, according to new research. The virus was detected in six common backyard species, and antibodies indicating prior ...

Cold and flu season typically happen during the fall and winter. Though it comes around every year, there's still a lot of confusion about viruses, vaccines and how to avoid getting sick. Experts and ...

Some viruses, like the common cold, are a flash in the pan. They infect us, our bodies fight back — which is what makes us sick — and then they’re gone, until the next variant rolls along. Other ...

After all the controversy over the past few years about gain-of-function research on viruses, especially the Covid-19 virus, I thought this kind of work was on hold, at least in the U.S. Indeed, the ...

Researchers have found the first experimental evidence explaining why the COVID-19 virus produces variants, such as delta and omicron, so quickly. The findings, published Sept. 13 in the journal ...

We still don’t know how the pandemic started. Here's what we do know — and why it matters. Credit...Illustration by Jules Julien Supported by By David Quammen David Quammen is the author of ...

A new study in rhesus macaques shows how the COVID-19 virus can enter the brain and cause inflammation of brain cells, especially in aged macaques. (CNPRC photo) SARS-CoV-2, the COVID-19 virus, caused ...