Immunology: Science Videos

This short series explains how your immune system defends your body. You will learn the difference between the fast, general innate immune response and the targeted adaptive response. You will also meet the key players, including phagocytes, B cells, helper T cells, and killer T cells. Understanding immunity helps explain how vaccines work and how the body fights illness. Some basic biology will help.

Note: All Khan Academy content is available for free at www.khanacademy.org