It takes about two days to get a cold after exposure to the virus. In this video, Larry Gooss, DO, a family practice doctor at Chippenham & Johnston-Willis Hospitals, explains how virus can continue to live on surfaces.
A RealAge answered. To prevent vitamin C deficiency, government guidelines recommend a daily dose of 90 milligrams (mg) for men, 75 mg for women. We recommend that you get 1,200 mg of vitamin C per day from food and supplements. This higher amount not only prevents deficiency but also helps prevent disease and needless aging.
[Related: Vitamin C Basics] How Much is Too Much? Although your body needs vitamin C to function properly, too much may lead to problems. According to the National Institutes of Health Office of Dietary Supplements, the upper limit of vitamin C is 2000 mg per day. Most people would not get such a high dose of vitamin C from food sources only.