What are the two types of adaptive immune responses?

The humoral immune response uses antibodies produced by B lymphocytes (or B cells). The B cells release the antibodies into the extracellular fluid where microbes can be located. The antibodies combine with antigens on the surface of the microbes and the combination of antigen and antibody makes it easier to eliminate the microbe. A key part of the response to vaccine is to stimulate production of antibodies which will circulate in the blood and respond immediately if the microbe against which the person was vaccinated is identified in the body.

Cell-mediated immunity is mediated by T lymphocytes (T cells). There are several types of T cells including helper T cells which coordinate various immune functions and killer T cells, which destroy cells infected with a virus. Helper T cells can stimulate antibody production by B cells, stimulate activity in killer T cells and increase activity in phagocytes. So they are increasing activity in different parts of the acquired immune system and linking innate and acquired immunity.