WORLDHydroxychloroquine COVID-19 Prevention Trials Incomplete: WHOAmrita ChakravortyJune 19, 2020June 19, 2020 by Amrita ChakravortyJune 19, 2020June 19, 20200771 Hydroxychloroquine can be ruled out as a treatment for hospitalised COVID-19 patients — but the World Health Organization said Thursday it was aware of ongoing...