You can still catch something even wrapped. Nothing is 100%. Get her tested first. Good luck with that.
Email me through the board if you want the contact information for a guy who will drive you around to the various sites. He drove us around for 6-8 hours (Christ statue, Sugarloaf, Soccer Stadium, Carnivale location and various other places) and I think he charged around $200 USD for the day. I assume he is still there.
You should see if your friends etc know anybody there - it's a much more manageable and enjoyable city with local help than trying to deal with everything on your own.
Do not carry stuff you buy back to the hotel. Either take a Taxi or have the vendor send it the the hotel for you.
It's the transgender capital of the world. So yes, take lots of pictures ...preferably before and after pics where we can see your expressions. Thanks.