Oh no... really?? I hadn't heard about that. You mean my cats may loose their effectiveness as protection against my mother visiting frquently? She really really allergic and thats WHY we have two cats Hahaha. :doh:cat allergy vaccine is going to be available, I heard they're in clinical trials now...
Would be really great though I suppose for people who would like to have a cat but cannot. I hope it works for them.