For almost 35 years Hans Sollinger has been searching for ways to combat Type 1 diabetes, a chronic and potentially deadly disease in which a patient’s immune system destroys the insulin-producing cells of his pancreas.

Sollinger attended graduate and medical school in his native Germany before moving to the U.S. in 1975 to do research and a surgical residency at the University of Wisconsin Hospital and Clinics, where he continues to work as a transplant surgeon, professor, and researcher. Read the full story here.