As our ancestors spread eastward toward Asia, so the researchers say, the virus evolved with its human hosts. (Via PLOS ONE)
So — basically the scientists did a family tree of the virus. By the way — why study HSV-1?
According to the researchers it's the perfect virus to study because it's spread through close contact, families tend to have the same strains, and it's rarely fatal.
- See more at Newsy.com