Word: hayflick
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Dates: during 1972-1972
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...slip into the vaccine with unpredictable effects on the human recipient. One stray monkey virus has turned up in some vaccine samples. Many virologists believe that it would be better to make the vaccine from viruses grown in human cells, specifically in a strain developed by Dr. Leonard Hayflick and Dr. Paul S. Moorhead. Originally derived from the lung tissue of a Swedish aborted fetus, this strain is pure, will reproduce itself 50 times and allows a huge yield of cellular material. Britain already uses polio vaccine produced in these cells, and the U.S.S.R. is switching...