2009 H1N1 flu (Swine Flu) from CDC
H1N1 flu (Swine Flu)
2009 H1N1 flu
(also known as "swine flu") is a new influenza virus causing illness in people.
This new virus was first detected in people in the United States in April 2009.
This virus is spreading from person-to-person worldwide.
Learn more about this new flu.

