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                Humoral Response

1. Bacteria with polysaccharide capsule and a B cell with antibody receptors
2. certain B cells bind to bacterial capsule and become activated. Activated B cells divide into daughter cells that secrete antibodies specific to the bacteria
3. Free antibodies then bind to the bacteia
4. complement can now bind to the bacteia and macrophages can now bind to the bacteria

          Cellular Response
1. A macrophage ingests a pathogen
2. The macrophage breaks the antigen into smaller fragments and attaches a Class II MHC protein to it
3. The entire complex (MHC and antigen) moves to the surface of the macrophage for presentation to a Helper T cell
4. The Helper T cell whose receptor matches that of the antigen on then surface of the macrophage will now bind to it. The helper T cell will now modulate the immune response.

Immunogenesis