A number of bird flu cases have been reported in the Chicago area in recent weeks, leading to many questions about how quickly the virus is spreading and how worried residents should be.
After two animals died of bird flu in Chicago, the Lincoln Park Zoo’s bird house will be closed for the near future.
Lincoln Park Zoo said the specific source of the exposure of the animals to bird flu, or H5N1 virus, is not known.
Seven Delmarva-region commercial operations have now reported cases of the highly contagious virus.
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