While in medical school, I was drafted into the U.S. Army with the other medical students as part of the wartime training program, and naturalized American citizen in 1943. I greatly enjoyed my medical studies, which at the Medical College of Virginia were very clinically oriented.

My interest was directed, from my medical student days, to Immunology, and particularly to the mechanism of hypersensitivity. I had suffered from bronchial asthma as a child and had developed a deep curiosity in allergic phenomena.

In 1970, Dean Robert Ebert offered me the Chair of Pathology at Harvard Medical School. I moved to Harvard because I missed the university environment and, more particularly, the stimulating interaction with the eager, enthusiastic, and unprejudiced young minds of the students and fellows.