I wonder how common this is. Until my AF experience (with it affecting others) I certainly didn’t know. We had some growing around home because my sister would get it once in a while (at that time I wasn’t sensitive to it), but I’ve no idea if we ever burned any or not.
Almost everyone I tell about it doesn’t know until I tell them. Granted, this is usually high schoolers, but still. If so many don’t know, how often does it happen to the point of sending people to the hospital?