Talk:The Zazzy Substitution/@comment-91.103.0.118-20120718202837/@comment-25311618-20141017235752

Do we know that? We don't know what all causes the immune over-reaction to develop in the first place (though there is the recent results about the role of IL-25). How do we know that it couldn't be triggered by a large concentration of cat dander or some other some protein found on cat epithelials. Sorry just my counter-Sheldon /:)