Xylitol is anti-viral. They even use it in nasal sprays and my son and daughter have both tried it with success. Coconut oil is really good for the body and is supposed to help with that as well. i also take echinacea (with goldenseal) in massive amounts for a couple of days, then in reduced amounts for a few days after. Include vitamin C, too, over 1000 mg while you are sick.