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The G4 virus, also known as the "G4 swine flu virus" (G4) and "G4 EA H1N1", is a swine influenza virus strain discovered in China. [68] The virus is a variant genotype 4 (G4) Eurasian avian-like (EA) H1N1 virus that mainly affects pigs, but there is some evidence of it infecting people. [68]
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).
The pandemic H1N1/09 virus is a swine origin influenza A virus subtype H1N1 ... After the emergence of the novel virus in the spring of 2009, it spread quickly across ...
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]
Influenza spreads between humans when infected people cough or sneeze, then other people breathe in the virus or touch something with the virus on it and then touch their own face. [54] The CDC warned against touching mucosal membranes such as the eyes, nose, or mouth during the 2009 H1N1 pandemic, as these are common entry points for flu ...
That is exactly what happened with the 2009 H1N1 swine flu and the Spanish flu of 1918 pandemics. Influenza A subtypes ... the virus that causes Covid-19, both flu A and B spread from person to ...
Even more rarely, the virus transmits from an infected human to other humans, as was the case during the H1N1 pandemic of 2009. The H1N1 flu virus was a combination of bird, swine, and human flus ...
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 ...