Charge up your immune system with powerful and simple tactics  Your immune system stands between you and all the world’s colds, flus, bugs, infections, and other illnesses. So why not keep it supercharged and ready to go? Boosting Your Immunity For Dummies, Portable Edition, shows you how to use nutrition and superfoods, detoxification, and other lifestyle changes to power up your immune system and keep it in tip-top shape.  Doctors Wendy Warner and Kellyann Petrucci—experts