Covid-19HydroxychloroquineProf. Harvey Risch Studies show hydroxychloroquine cuts ‘virus mortality in half …/ By Dr. Risch/ Sky News By Contributing Writers - September 6, 2020 Share Facebook Twitter Pinterest WhatsApp Linkedin VK Studies show hydroxychloroquine cuts 'virus mortality in half in high risk groups'Yale University Professor Harvey Risch says all studies which study the effectiveness of hydroxychloroquine on high risk population groups show the drug is “uniformly beneficial” in treating COVID-19.Posted by Sky News Australia on Saturday, September 5, 2020 Yale University Professor Harvey Risch says all studies which study the effectiveness of hydroxychloroquine on high risk population groups show the drug is “uniformly beneficial” in treating COVID-19.