Priscilla Sheath Kincaid-Smith, Mrs. Fairley, AC, CBE (30 November 1926 – 18 July 2015), was an Australia-based South African physician and researcher, specializing in nephrology. She was a past President of the Royal Australasian College of Physicians (1986-1988; first woman Councillor in 1976), World Medical Association and International Society of Nephrology (1972-75).
Kincaid-Smith was born in Johannesburg in 1926 and studied medical science at the University of the Witwatersrand in there. She earned her BSc (Hons) in 1946 and her BMBS (Bachelor of Medicine, Bachelor of Surgery) in 1950. She was awarded a DSc by the University of the Witwatersrand in 1979. From 1951–53, she worked at Baragwanath Hospital in Johannesburg, holding resident positions in Medicine and Surgery and Registrar in Medicine. She died on 18 July 2015 at the age of 88.
In the early 1960s Kincaid-Smith demonstrated evidence of the links between headache powders containing phenacetin (sold as Bex and Vincent's APC in Australia) and kidney cancer, and campaigned strongly against the use of such powders. She also contributed to research on links between high blood pressure and renal malfunction.
Kincaid-Smith was President of the Royal Australasian College of Physicians (1986–88), as well as past president of the World Medical Association, and International Society of Nephrology. She was a Member of the Walter and Eliza Hall Institute.
Dr Kincaid-Smith married Dr Ken Fairley, also a medical doctor, in London in 1958. They had three children, the twin boys Stephen and Christopher, who became a gastroenterologist and an infectious disease epidemiologist. Their later born daughter Jascenth studied veterinary medicine and moved to the USA where she worked as a manager in the pharmaceutical industry. Their offspring produced eight grandchildren.