T cell-mediated immunity

T helper cells (Th)

T cytotoxic cells (Tc)

B cells

Macrophages

Antibody production

Phagocytosis and killing

Infected cells

help

help

kill

B CELL ACTIVATION & ANTIBODY PRODUCTION

HLA class II

CD4+

Interferon-γ

HLA class I

CD8+

Kill

HLA class II

CD4+

Naïve

CD80/86