I have said it before, and I'll say it again: you can fault McD for a lot of things. You can argue that the products aren't to your taste, or subpar in regards to nutrition. But food safety is something that the clown takes extremely serious.
I've gotten sick from burger king. Once I had to decide what I'd rather wipe off the floor, because it was coming out both ways after eating Carl's Jr. But I've never been poisoned by McDonald's, nor have I talked to someone who has either.
Last time I went on this rant, a former McDonald's employee commented about food safety practices. They told how if you went to the bathroom and came back multiple people would ask you if you remembered to wash your hands. Not like this specific commenter, but that was just what they did to everyone. If you came in sick, you would be sent home with pay (I believe this was in the US, so it was actually extraordinary).