Powerful blasts destroyed homes and sparked panic in the city of Bujumbura on Tuesday night.

Researchers on Wednesday reported two promising new approaches to counteract malaria’s growing resistance to medication — one involving a new class of drugs. Switzerland-based Novartis released results of what it called a next-generation treatment. A study of its experimental drug in 12 African countries found it works well against the mosquito-borne parasite that causes malaria and seems to block spread.

Federal officials are questioning the safety of the vaccine series children receive. Here’s the story of how the childhood vaccine schedule came about.