OLCreate: HEAT_IM_ET_1.0 Immunization Module: Immunity, Vaccines and the Expanded Programme on Immunization: Figure 1.3 Herd immunity can increase in a community through exposure to infection to a vaccine. (Diagram: Basiro Davey)

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Figure 1.3 Herd immunity can increase in a community through exposure to infection to a vaccine. (Diagram: Basiro Davey)

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