https://aspenjournals.onlinelibrary.wiley.com/doi/10.1002/ncp.10832
This "meta" study found no benefit from IV/C against Covid-19 (Garbage in, Garbage out?)
Because this analysis was run in China, I tend to give it more credence, however.
We identified a total of seven related articles, which were included in this study.
In addition to standard therapy for COVID-19, patients included in the studies were treated with 2–24 g of IV-VC/day for 3–7 days following admission. The sample size ranged from 32 to 323 patients.
This meta-analysis showed that IV-VC treatment did not affect disease severity compared with placebo treatment or usual care (odds ratio [OR], 0.70; 95% CI, 0.45 to 1.07; P = 0.10). In addition, no statistically significant difference in mortality was observed between patients who received IV-VC treatment and those who did not
Per usual, the dosage makes all the difference. Thanks to Dr. Cathcart, we know that when someone is sick with a cold (corona virus) they can tolerate 100 grams or more orally every day. See; Cathcart's TITRATING TO BOWEL TOLERANCE
https://vitamincfoundation.org/www.orthomed.com/titrate.htm
A small oral dosage of 2-24 g would probably not be enough to show much of a benefit, and there is no reason to think an IV/C of similar small doses would either.
An analysis of benefit to dose would have been nice.
Taking this as at least partially true, it means that higher doses of vitamin C are required, probably in conjunction with steroids, vitamin D, zinc, etc.