well everyones immune system is different. some people get rid of a cold in 2-3 days while others can go for 2-3 weeks. what YOU feed is your body is how it will be prepared to fight disease. it doesnt take a genius to figure that out. your body is like a car. if you give it a good tune up it will run well. if you don't take care of your car guess what? it will leave u on the road.