Draped in embroidered cloth, laden with candles, redolent with roses and incense, the altar at the Santa Fe, New Mexico, home of Eetla Soracco seems an unlikely site for cutting-edge medical research. Yet every day for 10 weeks, ending last October, Soracco spent an hour or more there as part of a controlled study in the treatment of AIDS. Her assignment: to pray for five seriously ill patients in San Francisco.
Soracco, an Estonian-born "healer" who draws on Christian, Buddhist and Native American traditions, did not know the people for whom she was praying. All she had were their photographs, first...