On July 4th, 2018, a paramedic was hurrying through a hospital in England when his supervisor flagged him down, looking worried. She asked if he had been one of the paramedics on a specific call a few days ago. Surprised, he said yes. The call had been pretty typical, so he didn’t understand why she was asking. But his supervisor said she’d explain in a minute – first, he had to take off all his gear right now. Because there was a chance – that what he was wearing, could kill him.