(CBS4) - A new COVID-19 variant -- omicron -- has some experts worried it could be more transmissible and more resistant to vaccines than previous variants of the virus. So just how did the virus get ...

The idea of a once-mild virus might mutate into a deadly pathogen is a staple of science fiction, and a common fear since the dawn of the pandemic. Many of the SARS-CoV-2 virus’ relatives, genetically ...

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 ...

No, viruses do not always weaken with mutations. Sometimes mutations can lead to a strain that's more transmissible or capable of causing more disease. "When a virus enters a human cell they replicate ...

New imaging reveals a built-in safeguard that allows B cell populations to rapidly expand in germinal centers without introducing deleterious mutations. Germinal centers are high-speed evolution ...