Erwin Popper was an Austrian physician, who, in 1908, along with Karl Landsteiner

Karl Landsteiner

Karl Landsteiner , was an Austrian-born American biologist and physician of Jewish origin. He is noted for having first distinguished the main blood groups in 1900, having developed the modern system of classification of blood groups from his identification of the presence of agglutinins in the...

 discovered the infectious character of Poliomyelitis.

Popper wrote his doctoral thesis in Vienna

Vienna

Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...

 in 1903 and then became a military surgeon with the artillery. From 1904 to 1905 he worked as a candidate and assistant physician at the Wiedner Hospital in Vienna, then moved to the Wilhelminenspital. In 1911 he became a resident doctor at the Allgemeine Poliklinik (outpatients clinic). As of 1918 he worked as a paediatrician in Vienna and director of the pediatric ambulance of the Vienna Krankenkasse
(statutory medical insurance company). In 1938 he emigrated to England and held jobs as Medical Officer in children’s homes until 1942, subsequently he worked as a Resident Medical Officer in Cheshire

Cheshire

Cheshire is a ceremonial county in North West England. Cheshire's county town is the city of Chester, although its largest town is Warrington. Other major towns include Widnes, Congleton, Crewe, Ellesmere Port, Runcorn, Macclesfield, Winsford, Northwich, and Wilmslow...

until 1945.

Source

• Paul Speiser: Karl Landsteiner, Entdecker der Blutgruppen und Pionier der Immunologie ; Biographie eines Nobelpreisträgers aus der Wiener Medizinischen Schule, 3rd edition, Berlin, Blackwell Ueberreuter-Wiss. 1990 ISBN 3-89412-084-3, page 150