Gains Made In Controlling Malaria, But Concerns Grow About Drug Resistance

Malaria is a disease that kills more than 600,000 people every year. It debilitates even more. Each year on World Malaria Day, we take stock of the disease, what’s been done to contain it, and what still needs to be done. As VOA's Carol Pearson reports, medical scientists have made huge gains in controlling malaria, but may face a perilous game-changer