Doto and Savannah, residents of England's Woburn Safari Park, are at risk of getting foot-and-mouth disease. Last week the zoo closed its doors to keep out the highly contagious virus, which causes many animals to develop painful blisters. Across Europe, workers had to slaughter thousands of animals that may have been exposed to the disease, which can be deadly. More than 20 cases have been reported in Britain.

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March 9, 2001 World Report