Three big studies dim hopes that hydroxychloroquine can treat or prevent COVID-19
http://www.sciencemag.org/news/2020/06/three-big-studies-dim-hopes-hydroxychloroquine-can-treat-or-prevent-covid-19
The Germans Trias i Pujol University Hospital near Barcelona, Spain, where a prevention trial with hydroxychloroquine took place
Science’s COVID-19 reporting is supported by the Pulitzer Center.