Updated meta analysis of 26 studies showing C
Q OR 0.60 [0.50 - 0.73], p<0.0001 from clinical studies.
For big data studies authors find inconsistent results and OR 0.84 [0.75 - 0.94], p=0.003.
Horby et al. excluded due to toxic doses, Skipper et al. excluded due to low PCR testing, Peters et al. excluded due to treatment being delayed until deterioration. Only a summary is provided. Different treatment delays (except Peters), risk level of patients, differences in dosage (except Horby), and usage of Zinc are not considered.