Swine flu may have been leaked from laboratory
Swine flu may have been leaked from a laboratory in 1970's, according to a study
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Tuesday, 30, Jun 2009 11:24
The Swine flu H1N1 influenza "A" may have been leaked from a laboratory, according to reports.
The Telegraph reports the flu may not have circulated if it hadn't been for a possible leak, suggested to be somewhere in Asia or the Soviet Union around 1977.
There are currently 5,937 confirmed cases of swine flu in the UK alone.
In a New England Journal of Medicine report out today, suggests H1N1 may have re-emerged by accident. There were no recorded cases of human to human transfer for 20 years from 1957, when it began to circulate in China, Hong Kong and the USSR.
In the study, by Dr Shanta Zimmer and Dr Donald Burke at the University of Pittsburgh, they said: "Careful study of the genetic origin of the virus showed that it was closely related to a 1950 strain but dissimilar to influenza A (H1N1) strains from both 1947 and 1957.
"This finding suggested that the 1977 outbreak strain had been preserved since 1950. The re-emergence was probably an accidental release from a laboratory source in the setting of waning population immunity to H1 and N1 antigens."
Yesterday a nine year-old-girl was the third person in the UK to die from swine flu.