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 ...

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.

The virus often mutates by simply deleting small pieces of its genetic code. The mutations "disguise" the virus from antibodies.

Add Yahoo as a preferred source to see more of our stories on Google. Photo Credit: iStock Researchers in Colorado were stunned while analyzing how the COVID-19 virus spread from humans to animals at ...

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 ...