Winter is near, and with that comes the fun holiday season and not-so-fun cold and flu season.  The foods we eat, however, can play a powerful role in helping us stay healthy. To break down which foods are the best immunity boosters, we asked VIS Expert and registered dietitian, Kate Daley, about the festive and functional flavors of these chillier months and how to use them to our advantage. Every fruit and vegetable has health benefits yet each one has a unique balance of vitamins...