"There was this really strange epidemic that was going around. Hundreds of people came down with it. It caused a lack of oxygen that made the patient's skin go slightly blue. Anyway, it was one of those Dream-related things." McCoy shrugged. "This Snape fellow developed an inhaler that brought the medicine straight into the lungs in such a way that it must have saved countless lives."
He nodded, then picked up his coffee and stood to wait with her for hers. "Cheers."