American health officials are preventing an outbreak of rabies by dropping vaccines from planes as part of a half-billion-dollar federal program.Over 9 million ketchup packet-sized pieces of food containing vaccines are scattered all over the Eastern United States to suppress the deadly neurological virus in raccoons and keep it from killing humans.The packets come in two flavors especially designed to appeal to the trash-diving mammal — vanilla and fishmeal — but 'packet thieves' who don't need the rabies vaccine, like gray squirrels and opossums, do make off with a few morsels.
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