Guidance: Contingency Planning for a Possible Influenza Pandemic, Version 2, 10 July 2006 [open pdf - 260KB]
"The Government judges that one of the highest current risks to the UK is the possible emergence of an influenza pandemic - that is, the rapid worldwide spread of influenza caused by a novel virus to which people would have no immunity, resulting in more serious illness than that caused by seasonal influenza. This Guidance provides information and advice for Category 1 and 2 responders under the Act, and planners more broadly, engaged in contingency planning against the risk of an influenza pandemic."
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UK Cabinet Office: http://www.cabinetoffice.gov.uk/