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PBS
Pbs Learning Media: Hiv Immunity
Although repeatedly exposed to HIV, Steve Crohn's blood cells were never infected. Dr. David Ho investigates in this video segment from NOVA: "Surviving AIDS."
PBS
Pbs Learning Media: Alzheimer's Disease
This video segment from the Secret of Life School Video: "Genetic Medicine: Tinkering with Our Genes" explores the potential for gene therapy to cure diseases like Alzheimer's. [2 min, 48 sec]