Where will the next pandemic come from? One expert says his "bet is on viruses." (Getty Images/Science Photo Libra) Nearly four years after COVID-19 emerged, public health experts already say it’s not ...

As the U.S. faces down the COVID-19 Delta variant – now fast-becoming the nation's dominant strain – reports of a new Lambda variant that first emerged in Peru in August 2020 are gaining the attention ...

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

Though we often think of viruses as being harmful, only a small percentage of the millions of known species are pathogens. In fact, viruses are all around us, playing helpful and intricate roles in ...

PHOENIX – Long before the coronavirus pandemic, Kathleen Muldoon knew what it felt like to have her life changed by a virus. In 2013, Muldoon was teaching embryology at the Geisel School of Medicine ...

A number of factors influence the way the virulence of a virus — that is, how harmful it is to its host — affects its ability to survive and spread; in some cases, higher virulence may help a virus ...

The authors do not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and have disclosed no relevant affiliations beyond their ...

Live virus vaccines use a weakened virus to help your body fight the real disease. Some people, like those who are very sick or pregnant, should not get live virus vaccines. A live virus vaccine ...