doctors in china report curing 50 of 50 patients in ICU with high dose, 10 to 20 g of vitamin C a day
in particular one patient who was on the verge of dying was given an emergency dose of 50 g vitamin C delivered by IV, resulting in quick improvement in his condition that could be observed in real time
https://youtube.com/watch?v=54D62zap67c
among patients that require ICU care the death rate I'm guessing is around 30 percent
so 50 out of 50 recovery is amazing
I assume they were in ICU because the study was conducted only on patients that required significant hospital care