If it was cooked on a pizza it should be fine anyway. I think it's only cheeses like Camembert, Brie etc that you'd have uncooked/cold that they say to avoid. I'm not exactly a cheese guru though, it's either plain old tasty cheese, or Parmesan if we're having pasta!
I'm sure it will be fine I might be wrong, but I think all cheeses sold in Australia must be pasteurized anyway (much like milk)