What are TH1 cells? And what cytokines they produce?

Th1 cells induced by microbes ingested by phagocytes M1 macrophages secrete cytokines that amplify T-cell response. Th1 cell activate macrophages by cytokines. IFN-g triggers production of IgG that promote phagocytosis because Fc receptors on phagocytes bind to IgG that cover bacteria – opsonisation