title: What's new about hay fever?
mesh_terms: D000818:Animals; D003228:Conjunctiva / Q000276:immunology; D006801:Humans; D008407:Mast Cells / Q000276:immunology; D009092:Mucous Membrane / Q000276:immunology; D009297:Nasal Mucosa / Q000276:immunology; D051381:Rats; D006255:Rhinitis, Allergic, Seasonal / Q000276:immunology*