Immune-boosting effect of natural remedies and supplements on progress of, and recovery from COVID-19 infection
et al., Tropical Journal of Pharmaceutical Research,
Retrospective survey-based analysis of 349 COVID-19 patients, showing no significant difference with vitamin C prophylaxis in unadjusted analysis. REC/UG/2020/03.
risk of severe case, 4.3% lower, RR 0.96, p = 1.00, treatment 14 of 139 (10.1%), control 12 of 114 (10.5%), NNT 220, unadjusted, severe vs. mild cases.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
This study is excluded in the after exclusion results of meta
unadjusted results with no group details.
Shehab et al., 2/28/2022, retrospective, multiple countries, multiple regions, peer-reviewed, survey, 7 authors, study period September 2020 - March 2021.