Bird
Flu (Avian Influenza)
Bird Flu (Avian Influenza) Main Page
Avian Flu (Avian Influenza)
Timeline of Human Flu Pandemics
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1918 |
Pandemic“Spanish flu” H1N1 The most devastating flu pandemic in recent history, killing more than 500,000 people in the United States, and 20 million to 50 million people worldwide. |
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1957-58
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Pandemic "Asian flu" H2N2 First identified in China, this virus caused roughly 70,000 deaths in the United States during the 1957-58 season. Because this strain has not circulated in humans since 1968, no one under 30 years old has immunity to this strain. |
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1968-69
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Pandemic "Hong Kong flu" H3N2 First detected in Hong Kong, this virus caused roughly 34,000 deaths in the United States during the 1968-69 season. H3N2 viruses still circulate today. |
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1977
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 Appearance
of a new influenza strain in humans“Russian flu” H1N1 Isolated in northern China, this virus was similar to the virus that spread before 1957. For this reason, individuals born before 1957 were generally protected, however children and young adults born after that year were not because they had no prior immunity. |
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1997
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Appearance
of a new influenza strain in humans H5N1 The first time an influenza virus was found to be transmitted directly from birds to people, with infections linked to exposure to poultry markets. Eighteen people in Hong Kong were hospitalized, six of whom died. |
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1999
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Appearance
of a new influenza strain in humans H9N2 Appeared for the first time in humans. It caused illness in two children in Hong Kong, with poultry being the probable source. |
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2002
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Appearance
of a new influenza strain in humans H7N2 Evidence of infection is found in one person in Virginia following a poultry outbreak. |
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2003
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Appearance
of a new influenza strain in humans H5N1 Caused two Hong Kong family members to be hospitalized after a visit to China, killing one of them, a 33-year-old man. (A third family member died while in China of an undiagnosed respiratory illness.) H7N7 H9N2 |
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2004
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Appearance
of a new influenza strain in humans H5N1 Caused illness in 47 people in Thailand and Vietnam, 34 of whom died. Researchers are especially concerned because this flu strain, which is quite deadly, is becoming endemic in Asia. H7N3 H10N7 |
| 2005 |
H5N1 The first case of human infection with H5N1 arises in Cambodia in February. By May, WHO reports 4 Cambodian cases, all fatal. Indonesia reports its first case, which is fatal, in July. Over the next three months, 7 cases of laboratory-confirmed H5N1 infection in Indonesia, and 4 deaths, occur. On December 30, WHO reports
a cumulative total of 142 laboratory-confirmed cases of H5N1 infection
worldwide, all in Asia, with 74 deaths. Asian countries in which human infection
with H5N1 has been detected: Thailand, Vietnam, Cambodia, Indonesia and China. |
| 2006 | H5N1 In early January, two human cases of H5N1 infection, both fatal, are reported in rural areas of Eastern Turkey. Also in January, China reports new cases of H5N1 infection. As of January 25, China reports a total of 10 cases, with 7 deaths. On January 30, Iraq reports its first case of human H5N1 infection, which was fatal, to the WHO. |
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