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.
Recommended Doses and Timing For Vitamin C. The recommended daily intake of vitamin C for adults is 75 mg for women and 90 mg for men, person who smokes and those indulged in rigorous training requires higher amount of vitamin C because of increased production of free radical.