UNDER CONSTRUCTION!
Probiotics help prevent harmful bacteria from taking over your intestines or entering your bloodstream, effectively protecting you from infection.
You can find them in probiotic foods like yogurt with live cultures, kefir, sauerkraut, kimchi, miso, tempeh and kombucha.
To ensure these beneficial bacteria continue to multiply, make sure to also favor a diet rich in prebiotics, such as bananas, garlic, onions and dandelion greens.
Garlic, in addition to being a prebiotic, contains compounds shown to prevent infection and boost defenses against the common cold and flu .
Finally, ensure that you are eating plenty of nutrient-dense, whole foods.
Basically consuming prebitics, probitics, garlic, and having an overall healthy diet may help prevent you from catching a cold or flu.
http://www.offthegridnews.com/alternative-health/probiotics-how-to-make-your-own/