More people have access to malaria bednets
Malaria's still one of the world's biggest killers, particularly in tropical regions. It's treatable, but far more effective than treatment is prevention through insecticide-treated bednets. Access to those has grown substantially in recent years, as this chart from the World Health Organization shows. If you'd like to help buy and distribute bednets, the Against Malaria Foundation is a very effective charity doing just that