Meta-analysis results for all treatments

Treatment relative effect with 95% CI; and degree of certainty (adaptated from GRADE). method

Treament Trials      
Demonstrated or suggested benefit Inconclusive results Uncertain results Safety results
vitamin C1noneinconclusive results for: deaths; hospitalization; symptomatic Covid-19

suggested 97 % decrease in new illness compatible with Covid-19 but with a low degree of certainty due to high risk of bias

suggested 59 % decrease in infection (PCR positive symptomatic or not) but the degree if certainty is unassessable

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Vitamin D0- - - -