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I’m
presenting historical data from the United States, because this is one of
the places where we have reasonable long-term data on typhoid fever
incidence.
This
graph shows the annual incidence of typhoid fever in the United States from
1912 through 1994.
During this 72-year period the incidence fell dramatically, from 82
cases to only 0.17 cases per 100,000 population, an almost 500 fold decline.
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