What is 2009 swine flu pandemic?
{{Infobox pandemic | name = 2009 flu pandemic | width = | map1 = H1N1 map by confirmed cases.svg | legend1 = {{legend|#2b0000|50 000+ confirmed cases}}{{legend|#550000|5,000+ confirmed cases}}{{legend|#8c0000|500+ confirmed cases}}{{legend|#d40000|50+ confirmed cases}}{{legend|#ff6666|5+ confirmed cases}}{{legend|#ff9999|1+ confirmed cases}} | map3 = | legend3 = | map4 = | legend4 = | map5 = | legend5 = | disease = [[Influenza]] | virus_strain = [[Pandemic H1N1/09 virus]] | location = [[World|Worldwide]] | arrival_date = January 2009- August 10, 2010 | index_case = [[Veracruz]], [[Mexico]] | confirmed_cases = | suspected_cases = | recovery_cases = | deaths = 150,000–575,000 (Estaimated 284,000 deaths) | territories = | total_ili = | website = }} The '''2009 flu pandemic''' or '''swine flu''' was an influenza pandemic that lasted from early [[2009]] to late [[2010]], and the second of the two pandemics involving [[Influenza A virus subtype H1N1|H1N1 influenza virus]] (first was the 1918–1920 [[Spanish flu]] pandemic and the second one was the 1977 Russian Flu). First described in April 2009, turned out to be a new strain of [[H1N1]] which resulted when a previous triple [[reassortment]] of bird, swine and human flu viruses.<ref>{{Cite journal |date= 9 July 2009 |title= Geographic Dependence, Surveillance, and Origins of the 2009 Influenza A (H1N1) Virus|url= https://archive.org/details/sim_new-england-journal-of-medicine_2009-07-09_361_2/page/115 |journal=[[New England Journal of Medicine]] |volume= 361 |issue=2 |pages= 115–19 |pmid=19474418|first1=Vladimir |last1=Trifonov|first2= Hossein |last2=Khiabanian|first3=Raul |last3=Rabadan|doi= 10.1056/NEJMp0904572 |s2cid= 205105276|df= dmy-all}}</ref> About 11–21% of the [[Globe|global]] [[population]] (About 6.8 billion), or around 700 million–1.4 billion people (Suspect cases) had affect the [[flu]] — more than [[Spanish flu|Spanish flu pandemic]].<ref>{{Cite journal|last1=Kelly|first1=Heath|last2=Peck|first2=Heidi A.|last3=Laurie|first3=Karen L.|last