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.
How much vitamin C should be taken to fight off a cold? For normal, healthy adults, the daily recommended amount is 75 mg for women and 90 mg for men. For young children up to 3 years of age, the recommended amount is 15 mg per day and is 25 mg per day for children between the ages of 4 and 8.