Vocation : Medical : Physician

Charles Beck or Karl Beck (August 19, 1798 – March 19, 1866) was a German-born American classical scholar, Harvard professor and friend of Charles Follen.

Alain Frédéric Carpentier (born 11 August 1933) is a French surgeon whom the President of the American Association for Thoracic Surgery calls the father of modern mitral valve repair. He is most well known for the development and popularization of a number of mitral valve repair techniques. In 1996, he performed the first minimally invasive mitral valve repair in the world and in 1998 he performed the first robotic mitral valve repair with the DaVinci robot prototype. He is the recipient of the 2007 Lasker Prize.

Anthony Saidy (born May 16, 1937) is an International Master of chess, a retired physician and author. He competed eight times in the U.S. Chess Championship, with his highest placement being 4th. He won the 1960 Canadian Open Chess Championship. The same year, he played on the U.S. Team in the World Student Team Championship in Leningrad, USSR. The U.S. team won the World Championship, the only time the U.S. has ever won that event.
Saidy is the author of several chess books, including The Battle of Chess Ideas, and The World of Chess (with Norman Lessing). His most recent book, 1983, a Dialectical Novel, is a work of "what if" political fiction inspired by Saidy's four sojourns in the USSR, during which he was able to get to know Russians from all walks of life in both public and intimate settings. Harrison Salisbury, Pulitzer Prize-winning Moscow correspondent of the New York Times, said that it had the "ring of truth."
As an older mentor he befriended Robert James Fischer (Bobby Fischer). It was in Saidy's family home in Douglaston, Long Island that Fischer secluded himself prior to the World Chess Championship 1972. Saidy and others successfully encouraged the apparently reluctant Fischer to go to Iceland, where he won the world crown in a match against holder Boris Spassky.
Saidy is the son of playwright Fred Saidy.

William Worrall Mayo (May 31, 1819 – March 6, 1911) was an English medical doctor and chemist. He is best known for establishing the private medical practice that later evolved into the Mayo Clinic. His sons, William James Mayo and Charles Horace Mayo, established a joint medical practice in Rochester in the U.S. state of Minnesota in the 1880s.

Casimir-Joseph Davaine (19 March 1812 – 14 October 1882) was a French physician known for his work in the field of microbiology. He was a native of Saint-Amand-les-Eaux, department of Nord.
In 1850, Davaine along with French pathologist Pierre François Olive Rayer, discovered a certain microorganism in the blood of diseased and dying sheep. In the diseased blood, Rayer and Davaine observed the bacillus that is known today as Bacillus anthracis, the causative bacterium of anthrax. Soon afterwards, Rayer published a description of the bacillus in a paper titled, Inoculation du sang de rate (1850).In 1863, Davaine demonstrated that the bacillus could be directly transmitted from one animal to another. He was able to identify the causative organism, but was unaware of its true etiology. Later on, German microbiologist Robert Koch investigated the etiology of Bacillus anthracis, and discovered its ability to produce "resting spores" that could stay alive in the soil for a long period of time to serve as a future source of infection.Casimir Davaine is also credited for pioneer work in the study of sepsis (blood poisoning).

Claudie (André-Deshays) Haigneré (born 13 May 1957) is a French doctor, politician and former astronaut with the Centre National d'Études Spatiales (1985–1999) and the European Space Agency (1999–2002).