For many in the developed world, life before vaccines and antibiotics is hard to imagine, let alone remember. In a mere matter of decades, we have rapidly reduced the risk of death from common infections and even eliminated some deadly diseases. But disease-causing organisms are fighting back, evolving ways to survive our biomedical weapons. The U.N. calls such antimicrobial resistance one of the greatest human health threats in the world. And it’s not just bacteria. Malaria kills more than a