Focuses on the immune system as the co-evolutionary center of a struggle between animals and pathogens in regards to human life within a germ-infested world. Deep discussion of the immune system, vaccines, pathogens (focusing on viruses) and how the battle between good and evil needs a healthy balance. Focuses on the biological aspects of cellular and system-wide defense against pathogens. Prerequisite: BIOL 350, 355, or 356. Offered: ASp.