PBS
Pbs: The Immune System's Battle Against Disease
A "just for fun" Shockwave game that allows you to control an animated macrophage against an invading virus. You must figure out how the let the Helper T-cells get involved.
Cells Alive
Cells Alive: How Lymphocytes Produce Antibody
Learn about how the immune system works. Topics include antigens and antibodies.
Khan Academy
Khan Academy: A Potential Cure for Ebola Hemorrhagic Fever
Read a passage about a potential cure for Ebola hemorrhagic fever and answer the follow-up questions to practice for the MCAT.