Some viruses mutate more rapidly than others. Learn more about why that is and what that means for your health. Have you ever wondered why you have to get a flu shot every year, but some vaccines are ...

A man has become the seventh person to be left HIV-free after receiving a stem cell transplant to treat blood cancer. Significantly, he is also the second of the seven who received stem cells that ...

Viruses typically aren’t considered ‘alive,’ as many core biological functions are outsourced to their potential hosts. But a newly discovered organism appears to straddle the line between virus and ...