Footnote

a This case was reported in MMWR (Morbidity and Mortality Weekly Report), published by the U.S. Centers for Disease Control, December 10, 1982. Dr. Ammann’s report of that case, published in the British medical journal The Lancet, April 30, 1983, said: “A disturbing observation in this report is that the platelet donor was healthy [when he gave the blood] and did not become ill with AIDS until 7 months after donation . . . The patient died aged 2 years with Pneumocystis carinii pneumonia.”