Bacteria and viruses are often lumped together as germs, and they share many characteristics. They’re invisible to the human eye. They’re everywhere. And both can make us sick. Bacteria and viruses ...

During the early stages of a pandemic, viruses tend to evolve in ways that enhance their ability to reproduce and spread, ...

Have you ever wondered why you have to get a flu shot every year, but some vaccines are one-and-done? It all has to do with how and how fast viruses evolve - and that depends on mutation rates.