At the Center for Disease Dynamics, Economics & Policy, economist Ramanan Laxminarayan looks at big-picture issues of global health.

Fredros Okumu studies human-mosquito interactions, hoping to better understand how to keep people from getting malaria.

Faith Osier is studying how humans acquire immunity to malaria and developing new malaria vaccines.

UPS's advanced analytics manager Mallory Freeman researches how to do the most good with data.

With a team of engineers, Paul Moller works on the Skycar, a combination car and jet, as well as the M200, a saucer-shaped hovering car. He also develops next-generation engines to power these and other amazing vehicles.

Professor James Logan leads an internationally renowned research program at the London School of Hygiene and Tropical Medicine, presents television programs and has a passion for science and natural history.

As the CEO of Public Radio International, Alisa Miller works to bring the most significant news stories to millions -- empowering Americans with the knowledge to make choices in an interconnected world.

Science historian Sonia Shah explores the surprisingly fascinating story behind an ancient scourge: malaria.

Using empathy and a clear-eyed view of mortality, BJ Miller shines a light on health care's most ignored facet: preparing for death.

Bart Knols is a doctor committed to killing mosquitoes and ending malaria.

Pardis Sabeti investigates the genomes of microbes, like Ebola and coronavirus, to understand how to slow them.

BCG's Johanna Benesty is a managing director and partner in the firm's Paris office.

Reuben Jonathan Miller is a sociologist, criminologist and social worker whose work centers on race, democracy and the social life of the city.

Joe DeRisi hunts for the genes that make us sick. At his lab, he works to understand the genome of Plasmodium falciparum, the deadliest form of malaria.

A powerhouse of scientific leadership in Africa, Christian Happi sequences and studies the genomes of infectious diseases like Ebola, HIV and coronavirus.

Marc Koska wants to improve health care in the developing world by re-designing dangerous medical tools -- and offering education to practitioners in under-funded clinics.

Ernest Madu founded the Heart Institute of the Caribbean, a revolutionary clinic for cardiovascular diseases in Kingston, Jamaica -- revolutionary for offering first-class health care in a developing nation. His next stop: Nigeria.

Bono, the lead singer of U2, uses his celebrity to fight for social justice worldwide: to end hunger, poverty and disease, especially in Africa. His nonprofit ONE raises awareness via media, policy and calls to action.

Will MacAskill is a cofounder of the effective altruism movement, a philosophy that tries to answer the question: How can we do as much good as possible?

David Heymann is a professor of infectious disease epidemiology at the London School of Hygiene and Tropical Medicine. He led the World Health Organization's global response to the SARS epidemic in 2003.

To power his family's home, young William Kamkwamba built an electricity-producing windmill from spare parts and scrap -- starting him on a journey detailed in the book and film "The Boy Who Harnessed the Wind."

Malaria activist

Rural inventor

Documentary Photographer