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RIO DE JANEIRO, BRAZIL - "Chloroquine is back!" celebrated President Jair Bolsonaro on Friday evening, JUne 5th. He was referring to another chapter of the soap opera involving the 'comings and goings' of research on its effectiveness - or otherwise - in the treatment of patients with the novel coronavirus.

This week, The Lancet withdrew from its site - at the behest of its authors - the global study that found that chloroquine and its derivative, hydroxychloroquine, offered no benefit to patients, and could even increase the risk of death in 30 percent of cases. Doubts regarding the research Subscribe to our Premium Membership Plan. Already Subscribed?