John Bienenstock CM FRSC (October 6, 1936 – July 25, 2022) was a Hungarian-born Canadian doctor.
He was educated at St Paul's School in London and studied medicine at Kings London and Westminster Hospital medical school graduating with his MBBS degree in 1960.
Bienenstock came to the United States to pursue research projects at Harvard University but left for Canada during the Vietnam War rather than be drafted as an army doctor.
[1] More recently, he became head of the Brain-Body Institute at St. Joseph's Healthcare Hamilton.
[3] Bienenstock introduced the concept of a common mucosal immune system.