I had to cancel a trip to Germany this week due to illness. While nothing fatal, it was a pretty bad case of the flu, but it made me wonder what the chances are that if I had gotten on the airplane, I would have been denied entry into Germany if I arrved sick. Has anyone had any experience with this?

I know a while back during the SARS outbreak, when I traveled through Narita, they had body temperature scanners going and checked all of the arrivals, however I never actually saw anyone stopped and once the outbreak was over, the scanners also vanished.