Dr. Mona Hanna-Attisha, who helped expose the Flint water crisis, speaks during a House Democratic Steering and Policy Committee hearing on Capitol Hill in Washington, D.C., on Feb. 10, 2016.
Monsoon rains flooded Mumbai in August 2017. Aedes aegypti mosquitoes can spread diseases like dengue fever. Drought has affected the health of Somalians.
(From left) Punit Paranjpe/AFP/Getty Images; Christophe Simon/AFP/Getty Images; Arif Hudaverdi Yaman/Anadolu Agency/Getty Images
On October 30, 1935, a Boeing plane known as the "flying fortress" crashed during a military demonstration in Ohio — shocking the aviation industry and prompting questions about the future of flight.
Dr. Eduardo Ibarra checks the blood pressure of Carmen Garcia Lavoy in the Toa Baja area of Puerto Rico. He's been making house calls in the area with nurse Erika Rodriguez.
Yudelmy Cataneda (from left), Javier Suarez and Claudia Suarez talk about health insurance with Yosmay Valdivian (right), an insurance agent from Sunshine Life and Health Advisors, at the Mall of Americas in Miami in 2014.
Joe Raedle/Getty Images
Nirma, 16, plays with her friends. She is married but still lives with her parents and talks to her husband on the phone sometimes. She is nervous about the duties she'll have to take on when she does move in with her husband. At the moment, she hopes to graduate high school and eventually become a doctor.
Harvard professor David Williams says, "Much of this discrimination that occurs in the health care context, and in other contexts of society, may not even be intentional."
Sarah Sholes/Courtesy of Harvard Chan