How much proof do you want? Hundreds of studies conclude – treat Covid-19 early with hydroxychloroquine!
HCQ is effective for COVID-19. The probability that an ineffective treatment generated results as positive as the 235 studies to date is estimated to be 1 in 6 quadrillion (p = 0.00000000000000018).
Early treatment is most successful, with 100% of 29 studies reporting a positive effect (13 statistically significant in isolation) and an estimated reduction of 65% in the effect measured (death, hospitalization, etc.) using a random effects meta-analysis, RR 0.35 [0.25-0.50].
92% of Randomized Controlled Trials (RCTs) for early, PrEP, or PEP treatment report positive effects, the probability of this happening for an ineffective treatment is 0.0017.