Turkeys roost indoors on a Suffolk Farm on November 14, 2007 in Stradbroke, England. A confirmed outbreak of the H5N1 strain of bird flu has been found on the Redgrave Park Farm in Redgrave, near Diss in Suffolk. A 3km protection zone and a 10km surveillance zone has been established around the infected premises. Following further tests, DEFRA has announced at a press conference that this particular virus does contain the highly infectious H5N1 substrain of Aviation Influenza (the fourth outbreak H5N1 in the UK this year), which in rare cases can spread to other species, including humans. By Jamie McDonald/Getty Images.

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