Remember the last time you were sick and your doctor gave you antibiotics? What might have happened if those drugs didn't work? As antibiotic-resistant bacteria spread around the world, this scenario is much more than a "what if." The World Health Organization calls antibiotic resistance "one of the biggest threats to global health, food security, and development today." To mark World Antibiotic Awareness Week, chemist TIm Wencewicz explains how we got here, why big pharmaceutical companies are neglecting the problem, and what his lab is doing to solve it.