Every year, and I generally don't get sick. Hell when I get sick it's usually because of alcohol. Frankly if I avoid getting sick once every 10-20 years because of it it's worth the cost. Worst case it's practice for my immune system training it what it should seek out and kill!
LOL just think of it as going to the gym for your immune system.
"Political correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t*rd by the clean end"