Resolution:
standard / ## Figure 4.
Estimation of the force of infection of hepatitis E virus in Japan. A. The map of three geographic locations in Japan (drawn by the authors). B. Compartment of the catalytic model. Susceptibles at age a, S(a), are infected at a rate λ and then enter into the compartment, infected, I(a). C. Schematic illustration of the time delay to seroconvert. If the time of seroconversion
t_{0 }and possible time of exposure t_{k }are given, probability of exposure at time t_{k }can be extracted by g(t_{0}-t_{k}), where g(t) is the probability density of the time required for seroconversion at t days after infection. See eqs. 9 and 10 for statistical details.
Satou and Nishiura |