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The first death from swine flu in Massachusetts occurred on June 14, 2009, when a 30-year-old Boston woman died. [234] Eleven deaths have been confirmed as being caused by the H1N1 virus in total. [ 42 ]
The Centers for Disease Control and Prevention (CDC) identified the first two A/09(H1N1) swine flu cases in California on April 17, 2009, via the Border Infectious Disease Program, [135] for a San Diego County child, and a naval research facility studying a special diagnostic test, where influenza sample from the child from Imperial County was tested. [136]
The 2009 swine flu pandemic, caused by the H1N1/swine flu/influenza virus and declared by the World Health Organization (WHO) from June 2009 to August 2010, was 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).
On 29 April, the US had its first confirmed death, [316] and on 5 May the first US citizen died from swine flu. [317] On 6 June, there were 17 confirmed deaths from swine flu in the US. [318] By mid-May 2009 many states had abandoned testing unless serious illness and/or hospitalization were present. [319]
It happened again in 2009, when a human and swine flu switched genes, unleashing the H1N1 swine flu outbreak that killed roughly 500,000 people. Already there is evidence this virus is swapping genes.
The CDC discontinued reporting of individual confirmed and probable cases of novel H1N1 infection on July 24, 2009. The CDC will report the total number of hospitalizations and deaths weekly, and continue to use its traditional surveillance systems to track the progress of the novel H1N1 flu outbreak. [119]
In 2009, H1N1 caused the first global flu pandemic in 40 years, with the first infections detected in California. More than 12,000 people died around the US, and nearly 61,000 people were infected.
Kawaoka and his colleagues combined the H5 hemagglutinin gene from the bird flu virus with genes from the 2009 H1N1 swine flu virus. Then they coaxed their hybrid to evolve in a way that allowed ...