The infamous carrier of typhoid fever, was Mary Mallon, also known as Typhoid Mary. Typhoid Mary was identified as a spreader of typhoid fever, yet she refused to self isolate herself. In 1907, she became the first carrier in the United States to be identified and traced. She was a cook in New York, who was directly responsible for 51 cases and three deaths, although indirectly responsibly for countless more. Typhoid Mary is a term for people who spread disease.
Similar to today with the coronavirus.. There are many people that are spreaders that don’t even know it. That is why it is so important to wear a mask or self isolate. Evidence around the world now shows that mask wearing and self-isolation works. Its the only way to slow the virus from spreading until a vaccine is ready.
For more information about Typhoid Mary go to the Wikipedia page on Mary Mallon.