Mary Mallon (1869–1938), famously known as “Typhoid Mary,” was the first recognized asymptomatic carrier of Typhoid fever in the United States.
Her story became a landmark in public health history.
- In 1906, sanitary engineer George Soper investigated outbreaks in Oyster Bay, New York
- He traced infections back to Mary Mallon
Shocking finding:
- She had no symptoms
- Yet carried Salmonella Typhi in her gallbladder
Remained in quarantine for 26 years until her death in 1938
Snapshot
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