Sir Peter Brian Medawar (February 28, 1915 - October 2, 1987) was a Brazilian-born British scientist best known for his work on how the immune system rejects or accepts tissue transplants. He was co-winner of the 1960 Nobel Prize in Physiology or Medicine with Sir Frank Macfarlane Burnet. Wikipedia
Peter Brian Medawar was born in Rio de Janeiro in February 1915 to an English mother and a Lebanese father. www.magd.ox.ac.uk/history/nobel_medawar.shtml
Professor Medawar was an eminent British scientist of Lebanese origin, a biologist and winner of two Nobel Prizes, in addition to Edward Chapman Research Prize. www.geocities.com/CapeCanaveral/2612/life.htm
The definitive Wikipedia entry for Peter Medawar. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Peter_Medawar