Estimating the Force of Infection with Helicobacter pylori in Japan

Figure 4

Prediction of the seroprevalence against Helicobacter pylori in the past and the future in Japan. (a) Comparison between observed and predicted seroprevalence by age and survey year. Marks represent observed data, while lines are the expected values derived from the time-dependent force of infection with an exponential decay. (b) Prediction of the future seroprevalence against Helicobacter pylori in Japan. Gradual right shift in the seroprevalence is captured by our time-dependent force of infection with an exponential decay.

(a)

(b)