Hydroxychloroquine doesn’t prevent coronavirus infection, study with more than 800 patients finds


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

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Over 80% of coronavirus patients on cruise ship had no symptoms, study says


A man navigates his boat next to Cruise Ships docked at the port of Long Beach during the COVID-19 Coronavirus pandemic on April 11, 2020 in Long Beach, California.

Apu Gomes | Getty Images

More than 80% of the passengers and crew infected with coronavirus on an expedition cruise ship did not show any symptoms, raising questions about the true prevalence of “silent” infections, according to a peer-reviewed study published Wednesday in Thorax.

The three researchers said their findings emphasize the need for accurate global data on the number of people, both symptomatic and asymptomatic, who have been infected with

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Trump-touted hydroxychloroquine has higher risk of death, study says


A pack of Hydroxychloroquine Sulfate medication is held up on March 26.

John Phillips | Getty Images

Hospitalized Covid-19 patients treated with hydroxychloroquine, the malaria drug President Donald Trump says he’s taking to prevent the coronavirus, had a higher risk of death than those who didn’t take it, according to a study published Friday in The Lancet.

Patients who took the drug or chloroquine, which hydroxychloroquine is derived from, were also more likely to develop irregular heart rhythms, according to the study. The study looked at more than 96,000 patients from 671 hospitals across six continents. 

Researchers at Harvard Medical

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Trump-touted drug doesn’t help patients, but raises heart attack risk, study says


U.S. President Donald Trump speaks to reporters during a meeting with Texas Governor Greg Abbott about coronavirus disease (COVID-19) response in the Oval Office at the White House in Washington, May 7, 2020.

Tom Brenner | Reuters

Another study shows that hydroxychloroquine — a drug President Donald Trump said showed promise in treating the coronavirus — appears to not help Covid-19 patients and, instead, places them at increased risk of heart attack.

Hydroxychloroquine taken in conjunction with azithromycin was associated with “significantly elevated levels of cardiac arrest” even after adjusting for factors such as sex, age, underlying health conditions and

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