Swine Flu Timeline: When Did the H1N1 Pandemic Begin?

The first cases of the H1N1 swine flu pandemic were reported in Mexico and the United States in March 2009. The World Health Organization declared the outbreak a pandemic on June 11, 2009. The pandemic lasted about a year, with most cases occurring in the Northern Hemisphere during the winter of 2009-2010.

Therefore, if these facts are taken into account, the Swine Flu did not start 8 months ago from 2009.