Sir Nicholas John Wald FRS FRCP FRCOG FMedSci FFPH (born 31 May 1944) is Professor of Environmental and Preventive Medicine at the Wolfson Institute of Preventive Medicine at Barts and The London School of Medicine and Dentistry, part of Queen Mary, University of London. He is "widely considered one of the world's leading epidemiologists and neonatal health experts" and, together with Malcolm Law, is the inventor of the polypill.
His main research has been in antenatal screening of pregnant women for congenital malformations. In the 1970s, he showed that fetal neural tube defects could be detected by measuring alpha-fetoprotein in the mother's blood. This was the first example of screening for fetal abnormalities.
He has received numerous awards, including, in 2000, the Joseph P. Kennedy Jr. Foundation Award for Scientific Research. Wald was elected a Fellow of the Royal Society (FRS) in 2004, and was knighted in the 2008 Birthday Honours for services to preventive medicine.
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- "2000 Kennedy Foundation International Awards to be Given at Gala Event in Seattle". March of Dimes. 2 August 2000. Retrieved November 14, 2014.
- "Professor Nicholas Wald elected Fellow of the Royal Society". University of London. 28 May 2004. Retrieved 20 February 2013.
- "Birth defect test guru knighted". BBC News. 14 June 2008.