I wonder just HOW the virus could be spread either from or to cats/dogs. I take it the OP was concerned she might catch something from a roaming cat(?)
I can see why dogs could be potentially dangerous because some owners allow their dogs to lick their faces, calling it 'kissing' (ugh) but cat's tongues are rough and they're not prone to licking faces as a general rule.
So where's the problem?
I wonder if birds can catch/spread it? No ones done any research on that (yet).
It's nigh on impossible to keep a cat indoors if its spent a whole lifetime free to roam - I think mine would devour the bricks and mortar to get out, well certainly they would wreck the place.
(ps - I love the Mrs Schlocome jokes, I imagine someone saying - 'may I stroke your pussy', and pussy replying 'I'm Freeee'