During the very height of the Mad Cow scare in the UK, everyone panicked and boycotted beef. 90% of US Beef is bought by the local market. If Americans are panicked by the media, the industry will be devasted.
Here in Northern Ireland, we were not affected as much because we had the highest standards of beef production in Europe. Consumers were happier. It didn't stop the Republic of Ireland sealing the border to prevent animals being transported into the republic. They did more to prevent animals crossing the border than they did preventing terrorists escaping over the border!!!
I am sure you are concerned, but stick to good quality meat and avoid low grade meat products like pies, burgers, stock cubes...gravy etc.
The farmers are to blame, trying their best to poison us all!