Bird Flu IMAGE.
FILE - In this Thursday, April 26, 2012 file photo, Balinese government officials prepare to cull chickens as a precautionary measure to prevent the spread of bird flu, at a market in Denpasar, Bali, Indonesia after an 8-year-old boy died from bird flu. The virus rarely infects people, but scientists are worried it could mutate and spread more easily. On Wednesday, May 2, 2012, a scientific journal published a study showing how scientists created their own lab-made bird flu virus. The experiment was an effort to figure out how to thwart a global epidemic.

FILE - In this Thursday, April 26, 2012 file photo, Balinese government officials prepare to cull chickens as a precautionary measure to prevent the spread of bird flu, at a market in Denpasar, Bali, Indonesia after an 8-year-old boy died from bird flu. The virus rarely infects people, but scientists are worried it could mutate and spread more easily. On Wednesday, May 2, 2012, a scientific journal published a study showing how scientists created their own lab-made bird flu virus. The experiment was an effort to figure out how to thwart a global epidemic.

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