Hydroxychloroquine was first approved for use in the US in 1955. <a href="https://c19hcq.com/" rel="nofollow">https://c19hcq.com/</a> is a list of several hundred papers relating to its use for Covid-19 patients. I guess that according to Facebook, any positive effects therein recorded are merely 'misinformation'. This would be funny if it weren't so tragic and scandalous. If you had put this in a novel published in an earlier era, no one would believe it.