Before revision:  We conclude their randomized, double-blind, placebo-controlled trial present consistent statistical evidence, at 99\% confidence level, that the treatment of Covid-19 patients with hydroxychloroquine is effective in reducing the appearance of symptoms if used from 0 to 2 days after exposure to virus with estimated relative reduction in symptomatic outcomes of 72\% after 0 days, 48.9\% after 1 day and 29.3\% after 2 days.
After revision:  We conclude their randomized, double-blind, placebo-controlled trial present consistent statistical evidence, at 99\% confidence level, that the treatment of Covid-19 patients with hydroxychloroquine is effective in reducing the appearance of symptoms if used before or right after exposure to the virus. For 0 to 2 days after exposure to virus with estimated relative reduction in symptomatic outcomes of 72\% after 0 days, 48.9\% after 1 day and 29.3\% after 2 days.