The author uses a lively fictional conversation between friends to write about the newest information on the lymphatic system learned from Scientific American. She covers T-cells and B-cells, cure ideas for colds based on research, autoimmune disease (what is known and the evolution of), AIDs and ideas for cures, histocompatibility and histoincompatibility (and mate selection), Bagel injuries (with knives), travel and susceptibility to microbes, problems with over doing hygiene, disease control with drugs tailor made, vaccines in bananas, tobacco, and potatoes for countries without vaccine administrators, stress and the immune system, computers and DNA.