How the pandemic swine flu virus came to be
Monday, September 14, 2009 - 02:07
in Health & Medicine
The new H1N1 strain is based primarily on an influenza virus that has been spreading in U.S. pigs since the mid-1990s. The virus behind the current influenza pandemic may be known as swine flu, but it didn't come only from pigs. Wild birds and humans also played a role in its creation. Scientists are still trying to unravel how it wound up infecting...