What's Hay Fever?

Rina Rhea: Some quite significant clinical issues go wrong when these cells are overzealous, let's say. So it's just hay fever? Could be hay fever. Because that's going to be- What's hay fever? Well, isn't that a cluster of symptoms? Is that like a condition with multiple things happening? Yeah, suppose it is. But when you say hay fever, what are the symptoms? Every time I go to bail some hay in the back in the boat- Rina Rhea?: Pretty sure what the school is. Oh, yeah. Having this got me very good.