During the last third of his life, Dr. Salk made a great deal of public appearances on various television shows and lecture halls. He used these venues to dispense advice on how to rear children, especially infants.
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 was briefly married to Catherine H. Waters of South Carolina. Their marriage took place in 1982, in New York.
- New York Times obituary. Retrieved 2011-01-07.
- Seattle Times obituary. Retrieved 2011-01-07.
- Tyhurst JS, Salk L, Kennedy M. Mortality, morbidity and retirement. Am J Public Health Nations Health. 1957;47(11 pt 1):1434-44. PMID 13470136.
- Salk L. The role of the heartbeat in the relations between mother and infant.. Sci Am. 1973;228(5):24-9. doi:10.1038/scientificamerican0573-24. PMID 4723340.
- Salk L, Lipsitt LP, Sturner WQ,. Relationship of maternal and perinatal conditions to eventual adolescent suicide. Lancet. 1985;1(8429):624-7. doi:10.1016/s0140-6736(85)92156-7. PMID 2857957.