The New York Times - Sunday, December 10, 1995
Gina Kolata

For years, researchers have been puzzled by why some people infected with the AIDS virus remain healthy for 15 or 20 years, while others fall ill within a few years?

The surprising answer may lie in newly discovered immune responses, reported Wednesday by scientists in Germany and the United States. The researchers found, in laboratory experiments, that white blood cells make substances that can prevent the virus from growing. The hypothesis is that different people, at different times during an H.I.V. infection, make different amounts of these chemicals.The great hope is that these chemicals may lead to a new type of treatment.

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