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Metropark Hotel in Wan Chai while it was under quarantine because of the first reported case of swine flu in Hong Kong. The 2009 flu pandemic in Hong Kong was part of the worldwide pandemic that started with the city's first reported case of influenza A virus subtype H1N1 infection, commonly called swine flu, on 1 May 2009, by a Mexican national who had travelled to Hong Kong via Shanghai.
The 2009 flu pandemic in Asia, part of an epidemic in 2009 of a new strain of influenza A virus subtype H1N1 causing what has been commonly called swine flu, afflicted at least 394,133 people in Asia with 2,137 confirmed deaths: there were 1,035 deaths confirmed in India, 737 deaths in China, 415 deaths in Turkey, 192 deaths in Thailand, and 170 deaths in South Korea.
The influenza viruses that caused the Hong Kong flu (magnified approximately 100,000 times) The Hong Kong flu was the first known outbreak of the H3N2 strain, but there is serologic evidence of H3N1 infections in the late 19th century. The virus was isolated in Queen Mary Hospital. [180]
In June 2010, scientists from Hong Kong reported discovery of a new swine flu virus: a hybrid of the pandemic H1N1 virus and viruses previously found in pigs. It was the first report of a reassortment of the pandemic virus, which in humans had been slow to evolve.
Hong Kong became one of the first jurisdictions to declare the swine flu as a notifiable disease. Much of the procedures against the contagion were learned from the 2003 SARS outbreak, of which Hong Kong was the epicenter of the outbreak. [267] [268] On 1 May, the first case in Hong Kong and also the first in Asia was confirmed. The Mexican ...
The virus is a novel strain of the influenza virus, [2] for which existing vaccines against seasonal flu provided no protection. A study at the U.S. Centers for Disease Control and Prevention (CDC) published in May 2009 found that children had no preexisting immunity to the new strain but that adults, particularly those over 60, had some degree of immunity.
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 Hong Kong flu was a category 2 flu pandemic caused by a strain of H3N2 descended from H2N2 by antigenic shift, in which genes from multiple subtypes reassorted to form a new virus. This pandemic killed an estimated 1–4 million people worldwide.