A Holocaust survivor, Berger is also known for his scholarship on ethics in the medical profession during and after World War II.
[1][2] Berger played a leading role in numerous pioneering surgical procedures of the heart and lungs.
He also broke ground in the understanding of lung volume reduction surgery, and he helped to develop that procedure.
[3] Starting in 1990, Berger became an outspoken critic of academics citing the scientific experiments conducted on concentration camp prisoners in Nazi Germany.
[1][4][5] Berger eventually became director of clinical research in the division of thoracic surgery and interventional pulmonology at Beth Israel Deaconess Medical Center in Boston.