Dr. Toyin Ajayi's parents instilled her with a sense of social responsibility from a young age, she says. Ajayi is the founder and CEO of Cityblock Health.

Cityblock Health founder Toyin Ajayi is working to fundamentally change the health care system. Here's how she tackles large-scale problems.

Dr. Toyin Ajayi's parents instilled her with a sense of social responsibility from a young age, she says. Ajayi is the founder and CEO of Cityblock Health.