In 1907, George Soper located the cause of a typhoid outbreak in New York City: a cook named Mary Mallon. Mary didn’t know it, but each and every meal she cooked carried a small chance for her clients to come down with the disease. Finding out the truth could cost Mary her job…and her freedom.Keep up with us on Instagram @serialkillerspodcast! Have a story to share? Email us at serialkillerstories@spotify.com Learn more about your ad choices. Visit podcastchoices.com/adchoices