According to your article, exposure to the Epstein-Barr virus in early life produces only flu-like symptoms but exposure at adolescence or later often results in mononucleosis, which is a possible precursor of multiple sclerosis, diabetes, rheumatoid arthritis, and chronic fatigue syndrome. It seems to me that much human misery could be eliminated by developing a vaccine for Epstein-Barr.

Jane Stein
Carnation, Wash.

Scientists are trying several approaches to develop a vaccine for Epstein-Barr virus. —N. Seppa