Both typhoid and paratyphoid are bacterial infections that primarily cause intestinal infections. However, there are many differences between the two. The bacteria that spread these infections are ...

The man with the strange request was George Soper, a sanitary engineer investigating a typhoid outbreak at a house in Oyster Bay, Long Island, where Mallon had worked. Soper believed that Mallon ...

But a strange pattern started to occur. Anywhere that Mary worked, family members in the household started to develop typhoid fever. In 1906, Mary worked for a wealthy banker, Charles Warren.