Research Article

Temporal Evolution of Immunity Distributions in a Population with Waning and Boosting

Figure 8

The solution for different boosting mechanisms. (a) Waning immunity, absence of immune boosts. (b) Boost to maximal level of immunity. (c) Uniform probability of boosting to any higher immunity level. (d) Nonlinear boost according to Figure 3(c).
(a) NOboost
(b) MAXboost
(c) ANYboost
(d) ODboost