Up to a third of schoolchildren in some parts of England may already have had swine flu

BMJ 2009; 339 doi: (Published 25 November 2009) Cite this as: BMJ 2009;339:b5051
  1. Anne Gulland
  1. 1London

Up to a fifth of school age children in England may have been infected with the swine flu virus in the first wave of the outbreak between April and the end of September this year, the Health Protection Agency has estimated. In the “hot spot” areas of the West Midlands and London that figure could be as high as 30%.

Around half of these children will have had mild symptoms or may even have been asymptomatic, which is consistent with the pattern of the virus in the rest of the population.

The agency looked at a large outbreak in schools, after which …

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