People in any blood group who were Rh-negative were also somewhat protected, especially if they had O-negative blood. Vitamin D fails to help in severe Covid-19 casesLow levels of vitamin D have been linked to higher risk for severe Covid-19, but high vitamin D levels do not fix the problem. They randomly gave 240 patients hospitalized with severe Covid-19 either a single high dose of vitamin D3 or a placebo. The same was true when the researchers focused on the 116 patients with vitamin D deficiency before the treatment. This study "suggests that HHC is significantly underutilized in the recovery of hospitalized Covid-19 patients."

Source: Dhaka Tribune November 28, 2020 06:45 UTC