This program tells the stories of four individuals whose immune systems failed to function properly: a toddler born without an immune system who received a bone marrow transplant at six weeks, has survived minor illnesses and infections, and faces a healthy future; a man who developed B-cell lymphoma (cancer of the immune system), was treated with a new product, and 11 years later is cancer free; one of the first men to be diagnosed with AIDS and one of its longest survivors—doctors and psychologists are uncertain whether his survival is due to certain cells in his immune system or to his positive mental attitude; and a woman who nearly died after an allergic reaction to a wasp sting, who can expect to overcome her potentially fatal allergy through a series of shots. The program provides information on how the immune system works, and explains why some treatments work and others don’t. Narrated by Merlin Olsen. (44 minutes)