Not for a while. I do know the big chains and particularly McDonald's have searched far and wide for beef sources. They also compound the pathogen problem by mixing meat from many animals before grinding it to make hamburger. Whereas your butcher shop would be lucky to get 3 cows into a single burger, a big mac may have 1000. One. Thousand.

I stopped eating beef for a long time after the vCJD scare. But it was a good excuse to reduce my carbon footprint. Chicken and pork have a much smaller footprint. Now I try to avoid cheap cuts and especially cheap ground beef.