A doctor's astounding story of promising new treatments from the rainforests of Brazil for diseases that compromise the immune system. During a working visit to Brazil, Dr. Thomas David was given a packet of leaves and bark by a native patient as thanks for his work, and a shaman gave him a recipe for a tea used by the rainforest people to treat a variety of ailments. Dr. David began using these plants in his clinical research in Europe and soon discovered that they were producing amazing results among patients suffering from cancer, AIDS, and other diseases that compromise the immune system. Preliminary studies performed at Stanford and Harvard have substantiated his findings, bringing Dr. David international attention for his groundbreaking work. Dr. David's story is significant not only for its account of research that may herald a major breakthrough in curing diseases that have been the scourge of the modern world, but also for its emphasis on the vast and largely unrecognized pharmacopoeia of the rainforest that is in imminent danger of being lost forever.