Kelsey was named head of the agency's drug investigation division.

Kelsey was tapped to head the agency’s drug investigation branch. Working at the FDA in different capacities into her 90s, Kelsey was able to witness the changes her actions helped inspire. Her visibility may have dimmed since, but her legacy endures. Privileging facts over opinions, and patience over shortcuts, she made evidence-based medicine the foundation of reforms that continue to protect people today.