Does eating snot really boost your immunity?

I remember hearing long ago that Rush Limbaugh said this? Snot traps germs, so how could eating it boost your immunity? Is it like the flu shot that gives you a shot of the flu virus to make your body immune? I'm a compulsive picker, but I don't eat it! If this is true, it would probably make me sick because the flu shot made me sick to my stomach - I had a bad reaction to it. I take Cold-eez lozenges when I feel like I'm getting sick - I swear they help, probably better than snot!!