The World Health Organization (WHO) declares H1N1 swine flu to be a global pandemic on June 11, 2009. The first such incident in over forty years and the third recent flu pandemic involving the H1N1 virus; the first being the 1918 –1920 Spanish flu pandemic and the second being the 1977 Russian flu.
There were 491,382 lab-confirmed) cases Some studies estimated that the number of cases including asymptomatic and mild cases was about 700 million to 1.4 billion people. ( 11 to 21 percent of the global population of 6.8 billion at the time. Lab confirmed deaths were 18,449 with estimated excess deaths of 284,000 - More
