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.
Other
Health on the Net Foundation: Neutrophil
Nice definition of the function and percentage of neutrophils found in the blood stream.
Cells Alive
Cells Alive: How Lymphocytes Produce Antibody
Learn about how the immune system works. Topics include antigens and antibodies.
PBS
Pbs Learning Media: Immune Cells in Action
In this video segment from The Secret of Life, watch as a virus attacks a cell, and learn how the immune system reacts to this onslaught. Includes background reading material and discussion questions. [1:40]