More health-care workers in contact with Missouri bird flu patient report respiratory symptoms CNNCDC A(H5N1) Bird Flu Response Update September 27, 2024 CDCPossible Cluster of Human Bird-Flu Infections Expands in Missouri The New York TimesFour more US health workers show symptoms after contact with Missouri bird flu patient ReutersMissouri investigates more possible human-to-human H5N1 avian flu spread University of Minnesota Twin Cities