This week we had some terrifying news from the World Health Organization: Antibiotics are failing us. A growing number of bacterial infections aren’t responding to these medicines—including common ones that affect the blood, gut, and urinary tract. The scary truth is that a growing number of harmful bacteria and fungi are becoming resistant to drugs. In this week’s Checkup, we’re trying something a bit different—a little quiz. You’ve probably heard about antimicrobial resistance (AMR) before, but how much do you know about microbes, antibiotics, and the scale of the problem?