A box of Plaquenil, an anti-malaria drug hydroxychloroquine made by Sanofi, used for years to treat malaria and autoimmune disorders.
Alain Pitton | NurPhoto | Getty Images
Hydroxychloroquine, the drug backed by President Donald Trump to combat Covid-19, is no better than a placebo in preventing infection of the coronavirus, according to results expected to be published Wednesday in the New England Journal of Medicine.
The study, the first randomized, placebo-controlled trial, which is considered the “gold standard” in science, looked at 821 people in the United States and Canada who had been exposed to the coronavirus. About 12% of