Ok, lets get serious for a minute here people.

From 1995 to 200 there have been 83 human fatalities from "mad cow" or prion disease linked to eating beef in Europe. That works out to less than 20 cases per year.

By one estimate "in the United Kingdom, this current risk appears to be extremely small, perhaps about 1 case per 10 billion servings.

On the other hand ~12,500 americans die of pneumonia every year.

I don't think mad cow in salmon is something we need to worry about.

On the bright side, if salmon did get mad cow disease there would be no market for all those salmon and the fishing would be great for us sports anlgers.