History of animal testing moment antibiotics were introduced, the fall became steep so that by the 1980s mortality in developed countries was effectively zero. In the 1940s, Jonas Salk used rhesus monkey cross-contamination studies to isolate the three forms of the polio virus that affected hundreds of thousands yearly. Salk's team created a vaccine against the strains of polio in cell cultures of rhesus monkey kidney cells. The vaccine was made publicly available in 1955 and reduced the incidence of polio 15-fold in the USA over the following five years. Albert Sabin made a superior "live" vaccine by passing the polio virus through animal
Lee Salk his older brother. Salk attended the University of Michigan. Salk's published work investigated the effect of retirement on mortality, the effect of the mother's heartbeat on the newborn, and the relationship between adverse maternal and perinatal conditions and later self-destructive behavior. He was the author of eight books. Salk was married twice, first to Kerstin and then Mary Jane. He had two children from his first marriage, a son Eric and daughter Pia. Salk developed cancer and died in hospital in Manhattan at age 65 on May 2, 1992. Salk was a professor at Cornell University Medical Center. Lee Salk