COVID-19 mild to moderate | COVID-19 severe or critically | ||
COVID 19 hospitalized | COVID-19 mild to moderate | COVID-19 severe or critically | |
Vitamins | |||
vitamin C | Kumari Zhang Jamali Moghadam Siahkali | ||
Vitamin D | Murai Annweiler ... Annweiler ... Entrenas ... | Rastogi Espitia-Hernandez | COVID-VIT-D |
hight dose vitamin D | COVIT-TRIAL |
7995 | Hazan, 2021 | 2 | 32 | 0 | excluded | not a RCT | risk of bias not avaialble |