[venning]

> ... 1906 ... to 1932 ... as the period of her infection of others ... That's still not 38 years ...

I never stated that she infected others for 38 years. Being an asymptomatic carrier does not require continually infecting others, only that the carrier maintains the infection without showing symptoms. [1] Additionally, the NIH article isn't complete in listing likely infections, as evidenced by comparing it to the Wikipedia article. Nor does is state that she continued to infect others until her paralysis in 1932.

As for the 38 years, the Wikipedia article notes 1900 as the first known, likely infection of a family she worked for. Then, from the NIH article:

> A post mortem revealed that she shed Salmonella typhi bacteria from her gallstones ...

Her death (and, presumably, post mortem) was in 1938. "Bacterial shedding" [2] implies infection and, thus, being a carrier in 1938, though asymptomatic. I arrived at 38 years by considering her likely a carrier from 1900 to 1938.

[1] https://en.wikipedia.org/wiki/Asymptomatic_carrier

[2] https://www.google.com/search?q=bacterial+shedding