No New Friend for Mace

So this wonderful cat that we found is not able to come home with us.  There was some issue with our local humane society, so as of Saturday, it was unsure if he was going to be ours or not.  So I got a call today that said that we can have him.  YAY!  Happiness  for about an hour.  They tested him for feline leukemia and FIV, which was positive for FIV.  Given that he has a large wound on his face, and has now spiked a fever, and developed signs of a strong upper respiratory infection, the vet feels that his immune system is too compromised.  Plus FIV is contagious to Mace, and there is not a vaccine for it to give to Mace.  Obviously, the guy was not meant to be with us, and another cat will come along at some point.