Snugs are Drugs for Bugs

No offense but that seems fairly groundless. The disease was clearly depicted as being spread through the pollen of the plants, which only the flash bees were immune to. It's a world of magic, so I don't think it's outlandish to think that there's a plant capable of shenanigans this extreme, I just find it strange how hundreds, perhaps thousands of ponies suffered through this plague (or witnessed their friends suffering through it), and absolutely no one managed to get the cure published — including Meadowbrook herself, before she vanished.