Knowing how viruses change in the initial weeks of an infection can provide important information about their adaptability.

A 13-year-old girl in British Columbia who was hospitalized with bird flu for several weeks late last year harbored a mutated version of the virus, according to a report published this week in the New ...

We're keeping an eye on new influenza and SARS-CoV-2 viral variants. Here's what we know about those viruses—and your immune system's ability to fight back. According to the U.S. Centers for Disease ...

Although viruses are known to undergo continual mutation, not all genetic alterations have a significant effect. Sometimes, a single mutation can change a virus's behavior, its ability to spread and ...

In simple terms: a mutation is a stable change in genetic sequence that can be copied when cells or viruses replicate. Most mutations have no detectable effect, some contribute to disease, and a small ...

Researchers said an effective HIV vaccine would need to stimulate the immune system to produce neutralising antibodies.

As the seasonal flu picks up, there are even more opportunities for the bird flu to acquire mutations as the different influenza viruses mix. A 13-year-old girl in British Columbia who was ...