They gave me that shot too. I started taking Vitamin C 2,000 to 4,000 mg per day years ago, as well as a lot of other vitamins and minerals, including about 2,000 IU Vitamin D. I also used to get sick a lot and now rarely do even with considerable stress. The body burns up C in 5 or 6 hours, so I take it 3 or 4 times a day in divided doses. What most people don’t know, including doctors, is that most animals that make their own C make a by weight equivalency to 2 to 4 grams compared to human size. And then the government tries to say 60 mg. is the RDA. Well, it is enough to prevent scurvy, but not promote good health, especially in cities with air pollution.
I take 1,000 MG of vitamin C twice a day, once at lunch and then one at dinner.