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The swine flu began in Mexico, North America, which turn out to be a new strain of H1N1 virus and the first case could have been as early as March or April. In Canada, roughly 10% of the populace were infected with the virus, [ 298 ] with 363 confirmed deaths (as of 8 December); confirmed cases had reached 10,000 when Health Canada stopped ...
The surge was assumed by authorities to be "late-season flu" (which usually coincides with a mild Influenzavirus B peak [19]) until April 21, [20] [21] when a CDC alert concerning two isolated cases of a novel swine flu was reported in the media (see 2009 swine flu outbreak in the United States). [22]
Mexico map by confirmed cases. ... 2009 swine flu pandemic in Mexico; 2009 swine flu pandemic in North America; Global file usage.
The 2009 swine flu pandemic in North America, part of a pandemic in 2009 of a new strain of influenza A virus subtype H1N1 causing what has been commonly called swine flu, began in the United States or Mexico.
2009 swine flu pandemic in Mexico; 2009 swine flu pandemic in North America; Talk:2009 swine flu pandemic/Archive 6; Talk:2009 swine flu pandemic by country/Archive 1; Talk:2009 swine flu pandemic by country/Archive 2; Talk:2009 swine flu pandemic in Mexico/Archive 2; File talk:H1N1 Mexico map by confirmed cases.svg
The United States experienced the beginnings of a pandemic of a novel strain of the influenza A/H1N1 virus, commonly referred to as "swine flu", in the spring of 2009.The earliest reported cases in the US began appearing in late March 2009 in California, [114] then spreading to infect people in Texas, New York, and other states by mid-April. [115]
A follow-up study done in September 2010 showed that the risk of serious illness resulting from the 2009 H1N1 flu was no higher than that of the yearly seasonal flu. [120] For comparison, the CDC estimates the global H1N1 death toll at 284,000 and the WHO estimates that 250,000 to 500,000 people die of seasonal flu annually. [121]
Children infected in the 2009 H1N1 flu pandemic were no more likely to be hospitalized with complications or get pneumonia than those who catch seasonal strains. About 1.5% of children with the H1N1 swine flu strain were hospitalized within 30 days, compared with 3.7% of those sick with a seasonal strain of H1N1 and 3.1% with an H3N2 virus. [198]