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. 2012 Nov 9;12:386. doi: 10.1186/1472-6963-12-386

Figure 2.

Figure 2

Modeling age-compartments and vaccine efficacy periods. Vaccine efficacy was modeled in three phases: initial ramp-up efficacy (2–13 months), full efficacy (13 months-3 years) and waning efficacy (3–10 years).