Anyone have any experience of mixing cat flu carriers with non flu carriers?

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I currently own two 2 year old cats who are healthy and have up to date vaccinations. I\\\'m considering adopting an old dear from the local cat rescue but she\\\'s currently got the flu. I wouldn\\\'t bring her home until this bout has cleared up but i know that she can still carry it. I\\\'ve had mixed advice from proffessionals as to whether my cats can still catch it despite their vaccinations. I\\\'d like to hear from anyone who might have been in this situation and what the outcome was, any advice would be much appreciated.