A figure I saw was that 1 in 30,000 eggs is infected.
The risk is greater for commercial products, where one tainted egg can contaminate a huge batch of product.
I wouldn't eat raw or soft-boiled eggs when my kids were small, but now we do. I also have been thrilled to find the Davidson's pasteurized eggs at Publix (we used to make special trips up to Harris Teeter in Jacksonville for these until it closed) , so I can now make my special chocolate mousse for guests, as I am nervous about using raw eggs for guests.