Cold and flu season is upon us -- hopefully, you're as prepared as possible. But getting the flu shot, washing your hands, and using sanitizing wipes can only go so far, especially with flu viruses being able to survive on surfaces for up to 48 hours. One of the best ways to keep your body healthy and strong enough to fight off viruses is by strengthening it from the inside. To do this, you should consume foods and drinks that have immune-boosting qualities. So to keep you healthy this cold and flu season, here are a few foods and drinks that can help give your immune system a much-needed boost.