From working in a pizza shop when I was a teen, I would steer clear of the meats on pizza.

Most shops don't keep them cool, and by the time you get to eat it there could be more bacteria.

Salami and ham is a definate no.... a. because its processed and b. they don't slice the meat the day of your pizza being made, they bulk order it and sometimes can be a little out of date...

So go for the veggie pizza - margharita!!!!!