János Plesch
János Oscar Plesch was a Hungarian academic pathologist, physiologist, and physician.
Plesch was well known internationally for his clinical research on blood circulation. He also invented the first convenient device for taking blood pressure.
Plesch was a close friend and doctor to Albert Einstein for 25 years. Plesch's autobiography contains two chapters on Einstein.
Plesch lived in Berlin for much of his early working life. As a Jew, he left Germany after the Nazi Party took control. Plesch moved to England where he was required to re-qualify as a medical doctor.