Members of Jonas Salk's family tree include his wife, Francoise Gilot, his brother, Lee Salk and his son, Darrell Salk. Jonas Salk, the inventor of the polio vaccine, experimented on his wife and sons, as well as himself, before releasing the vaccine for others to use. His brother Lee was also a doctor, specializing in child psychology and writing books on family relationships.
Lee Salk was also known for his television appearances and his work as a columnist for McCall's magazine. He died before his brother Jonas in 1992, having suffered from cancer.
Jonas Salk's son Darrell, another doctor, related his experiences of being experimented on by his father to SeattlePi.com in 2004. He recalled in particular how he used to hide from his father to avoid blood testing, but explained that Salk felt it was ethical to experiment on his own family before recommending that his vaccine be used by others on theirs.
Before marrying Jonas Salk, Francoise Gilot had a 10-year relationship with Pablo Picasso. She is known for her own paintings and drawings, which number more than 6,000 in total. She was introduced to Jonas Salk in 1969 and they were married in 1970, despite Gilot's earlier reservations about scientists being tedious company.