Medical and health researchers

Thalia Papayannopoulou

Thalia Papayannopoulou is a hematologist and cell biologist at the University of Washington who showed fetal hemoglobin can be reactivated in adults and identified VLA-4's role in stem cell movement.

Thea D. Tlsty

Thea D. Tlsty, also published as Thea Tlsty, is an American cancer biologist and Professor of Pathology at UCSF known for work on gene amplification, p53, and tumor stroma.

Theo Vos

Theo Vos is a Dutch-trained physician, epidemiologist, and health economist who is Professor Emeritus at IHME in Seattle and led the Global Burden of Disease study's non-fatal burden estimates.

Sep 17, 2026

Theobald Smith (1859–1934), American bacteriologist and comparative pathologist; proved tick-borne Texas cattle fever, distinguished bovine and human tubercle bacilli, pioneered killed vaccines and anaphylaxis research.

Theodor Frølich

Theodor Frølich, also known as Theodor Christian Brun Frølich, was a Norwegian professor of pediatrics who produced the first experimental animal model of scurvy with Axel Holst in 1907.

Theodore B. Bayles

Theodore B. Bayles was an American physician-scientist in rheumatology who spent his career in Boston, heading a research program at the Robert B. Brigham Hospital from 1939.

Theodore B. Van Itallie

Theodore B. Van Itallie (1919–2019) was an American physician and obesity researcher who led St. Luke's Hospital in New York and founded the New York Obesity Research Center.

Theodore Caldwell Janeway

Theodore Caldwell Janeway (1872–1917) was an American physician who held Johns Hopkins' first full-time professorship of medicine and made blood-pressure measurement a routine part of practice.

Theodore E. Warkentin

Theodore E. Warkentin is a Canadian clinical and laboratory hematologist at McMaster University and Hamilton General Hospital, best known for heparin-induced thrombocytopenia research and devising the 4Ts scoring system.

Théodore H. Ingalls

Théodore H. Ingalls was an American physician and researcher in pediatrics and teratology who argued from 1950 that congenital anomalies may be acquired during gestation, not only inherited.

Theodore M. Bayless

Theodore M. Bayless was an American physician-scientist at Johns Hopkins who spent more than 50 years there, defining lactose intolerance as a clinical condition and helping establish the role of genetics in Crohn's disease.

Theodore Pincus

Theodore Pincus is an American rheumatologist and professor of medicine at Rush University in Chicago, known for the MDHAQ questionnaire, the RAPID3 index, and a 1969 DNA antibody test that made lupus diagnosis routine.

Theodore Rodman

Theodore Rodman (1928–2016) was an American pulmonary physician and professor of medicine at Temple University whose research on respiratory failure and open-heart surgery appeared in the New England Journal of Medicine.

Theodore S. Lawrence

Theodore S. Lawrence is an American radiation oncologist and physician-scientist, the Isadore Lampe Professor at the University of Michigan, known for developing chemoradiation and radiosensitizers for gastrointestinal tumors.

Theodore W. Kurtz

Theodore W. Kurtz is a physician-scientist and Professor of Laboratory Medicine at the University of California, San Francisco, known for research on salt-dependent hypertension and rat genetics.

Theophil Mitchell Prudden

Theophil Mitchell Prudden (1849–1924) was an American pathologist and bacteriologist, first professor of pathology at Columbia's medical college, who co-wrote a standard pathology handbook and helped found the Rockefeller Institute.

Theresa L. Walunas

Theresa L. Walunas is an American immunologist and biomedical informatician, first author of the 1994 paper showing CTLA-4 is a negative regulator of T cell activation.

Thérèse Tréfouël

Thérèse Tréfouël, born Thérèse Boyer, was a French chemist at the Institut Pasteur who in 1935 showed that sulfanilamide, not the dye prontosil, was the active antibacterial agent.

Thierry André

Thierry André is a French medical oncologist, professor at Sorbonne Université and head of medical oncology at Hôpital Saint-Antoine, Paris, known for leading the MOSAIC and KEYNOTE-177 colorectal cancer trials.

Thierry Calandra

Thierry Calandra, born 1956 in Lausanne, is a Swiss physician-scientist known for showing in 2000 that blocking macrophage migration inhibitory factor protects against septic shock.

Thierry Façon

Thierry Façon (born 1959) is a French hematologist and professor who heads the hematology service at CHU de Lille, known for leading myeloma trials including FIRST, MAIA, and IMROZ.

Thierry H. LeJemtel

Thierry H. LeJemtel is a French-trained cardiologist specializing in advanced heart failure and transplant cardiology, Henderson Chair Professor of Medicine at Tulane University School of Medicine since 2005.

Thierry Philip

Thierry Philip (born 1949) is a French medical oncologist and professor at Université Lyon 1 who directed Centre Léon-Bérard and chaired Institut Curie in Paris from 2013 to 2024.

Thierry Poynard

Thierry Poynard, born in 1950, is a French hepatologist known for hepatitis C clinical research and for inventing FibroTest, a blood-based alternative to liver biopsy.

Thierry Soussi

Thierry Soussi (born 1956) is a French cancer researcher and professor at Sorbonne Université in Paris, known for his work on the TP53 tumor suppressor gene and for building the UMD TP53 mutation database.

Thomas A. Buchanan

Thomas A. Buchanan is a physician-scientist at the Keck School of Medicine of USC known for research on gestational diabetes and diabetes prevention in Hispanic Americans.

Thomas A. Ferguson

Thomas A. Ferguson is an immunologist at Washington University in St. Louis who studies cell death, immune privilege, and autophagy in the eye, including corneal transplant success.

Thomas A. Gaziano

Thomas A. Gaziano is an American cardiologist and health-decision scientist, associate professor at Harvard Medical School and the Harvard Chan School, who studies cost-effective cardiovascular disease prevention in developing countries.