In the early 1900s, Mary Mallon, a cook, was unknowingly ahealthy carrier of Typhoid fever.Written by Claudia Jansen, Morgan Metz, and Marian MoserJones. Narration by Dr. Nicholas B. Breyfogle. Video production by Laura Seeger, Dr. Nicholas B. Breyfogle, and Hannah Keller. A tran ... Show more