However much it is, I'm sure it's exactly the same for everybody.
Bulk poo?
Like alternator-sized?
But seriously, I think it just depends. There's a restaurant near work that practically half of my co-workers go to every day because of convenience. After a few instances of getting sick shortly after I started working at my current job, I realized that the restaurant in question was what was causing it. Apparently whatever bacteria they have swimming on their food doesn't cause much or any harm to my co-workers, but it sure makes me want to die.