2009 H1N1 Pandemic
The first cases of H1N1 were reported in Mexico. However, in early April 2009 the U.S. had 2 confirmed cases. Within two months the number of reported illnesses jumped and by June of 2009 all fifty states had H1N1 cases. Many other countries had reported cases of H1N1 and it later became a global pandemic issued by the World Health Organization. Vaccinations were distributed nationwide by the fall of 2009. After the initial outbreak in April of 2009, the Centers for Disease Control and Prevention kept an eye on the illness and how it was spreading. They released weekly reports called “Flu View” and monitored H1N1 activity across the U.S. During the spring of 2010 H1N1 activity became sporadic throughout the U.S. and the Centers for Disease Control and Prevention declared the H1N1 public health emergency to be over on June 23, 2010. Shortly after, on August 10, 2010, the World Health Organization declared the worldwide pandemic to be over.
Flu pandemics (existing throughout the entire country, continent or worldwide) have existed for many years, with five known pandemics: 1889, 1918, 1957, 1968, and 2009.

For more coverage on the 2009 H1N1 Pandemic visit:

Pandemic (H1N1) 2009 (World Health Organization)

For more information on pandemic flu visit:

Pandemic Flu (Cleveland Department of Public Health)

Pandemic Influenza (Cleveland Department of Public Health)