Why the WHO approval of the first malaria vaccine is a big deal
Every year, malaria kills more than 400,000 people, most of them children. There has been significant progress against the disease in the past few decades — death rates have fallen nearly in half since 2000 — but there’s still a long way to go. For decades, researchers have been working on developing a vaccine. It hasn’t been easy. Malaria, a parasite infection, is hard to vaccinate against, and many attempted vaccines haven’t produced durable immunity.…