In the 1970s, experts from Helen Keller Intl spearheaded research that has helped save millions of lives and shaped the organization’s work for decades.

Dr. Al Sommer, now Professor and Dean Emeritus of the Johns Hopkins Bloomberg School of Public Health, led one of the studies on vitamin A that resulted in a groundbreaking discovery about the role it plays in children’s health.

Watch our video to hear Al discuss how this research came about and the profound impact it had on global health and Helen Keller.