A little girl falls prey to a disease so deadly and rare, the CDC fears it might be an act of bioterrorism. Investigators scramble to find the source, but the answer comes from somewhere nobody was expecting.

Follow MrBallen's Medical Mysteries on Amazon Music or wherever you get your podcasts. New episodes publish for free every Tuesday. Prime members can binge episodes 41-48 early and ad-free on Amazon Music.

Wondery+ subscribers can listen ad-free--join Wondery+ in the Wondery App or on Apple Podcasts.

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.