In 2015, Steffanie Strathdee's husband nearly died from a superbug, an antibiotic resistant bacteria he contracted in Egypt. Desperate to save him, she reached out to the scientific community for help. What she got back? A 100-year-old treatment that's considered experimental in the U.S. Strathdee, an infectious disease epidemiologist, tells us how it works, its limitations, and its potential role in our fight against superbugs. Follow host Maddie Sofia on Twitter @maddie_sofia. Email the show at shortwave@npr.org.