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., 28 Feb 2022, retrospective, multiple countries, peer-reviewed, survey, 7 authors, study period September 2020 - March 2021.