The Columbia University Mailman School of Public Health mourns the passing of dear friend Sidney Lerner. Sidney was a tireless public health champion whose vision and work improved the health of communities around the world. Sidney was one of Columbia Mailman’s greatest advocates and supporters and a dedicated member of the School’s Board of Advisors for 17 years. We will miss him deeply and we extend sincere condolences to his wife Helaine. May his memory be a blessing.