In the early 1900s everyone from scientists to sanitation workers were trying to crack a true medical mysterywho was spreading typhoid fever in community of Mamaroneck, New York? All signs pointed to domestic worker Mary Mallon, but could she spread the disease without showing symptoms herself? Marnie and her trusted AI sidekick Glitch are on the case, following the clues to learn the history of typhoid fever, how it spread, and how were protected from typhoid fever today. Science enthusiast Marnie discovers the fascinating history of this disease while going above and beyond, as usual, for her research project. A fun graphic approach, diverse characters, and humorous text tell this thrilling story of medical history in a high-interest format.Marnies Medical Mysteries was developed in collaboration with Nipunie Rajapakse, M.D., Pediatric Infectious Diseases Physician at the Mayo Clinic Children's Center. She completed a Master of Public Health at the Harvard T.H. Chan School of Public Health and previously worked as a consultant with the World Health Organization.Mayo Clinic Press Kids creates empowering health and wellness content in partnership with pediatric experts. Proceeds from the sale of every book go to benefit important medical research and education at Mayo Clinic.