RIO de JANEIRO, Brazil, July 25-A Connecticut doctor said today that his patient is the source of the highly publicized, rapidly-progressing, multi-drug-resistant HIV strain that aroused considerable concern when a New York man was infected earlier this year. "However," said Gary Blick, M.D., a private practice physician in Norwalk, Conn., "we want to emphasize that our patient is not rapidly progressing. Nor is that patient's life partner, who is also infected with a similarly highly resistant strain, rapidly progressing." The reason the infected New York City man's immune system suddenly deteriorated in a three-month period might have had more to...