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[WASHINGTON (AP) -
In an isolation ward of a Baltimore hospital, up to 30 volunteers will participate in a bold experiment: A vaccine made with a live version of the most notorious bird flu will be sprayed into their noses.
First, scientists are dripping that vaccine into the tiny nostrils of mice. It doesn't appear harmful - researchers have weakened and genetically altered the virus so that no one should get sick or spread germs - and it protects the animals enough to try in people.