It does not mention the amount of vitamin D3 given to the patients and of course it excludes previous studies that aren't in English which is very convenient. In 2021 there was a German study that looked at death rates for people with covid and it looked at there blood levels of vitamin d. It specifically looked at people who had known levels of vitamin d prior to getting covid to exclude the possibility that covid somehow affected their blood levels. And what the data showed was that at 50 nanograms per milliliter you reach 0 deaths. Of course the study didn't say that there would be no deaths because there's always going to be some unusual case where somebody dies but they also went on to say that you needed to take 5,000 IU's per day of vitamin D3 to reach that level of 50 nanograms per milliliter. Nobody seems to want to report this information.