Hydroxychloroquine, a decades-old malaria drug touted by President Donald Trump, didn’t appear to help hospitalized patients with Covid-19, according to a new observational study published Thursday in the New England Journal of Medicine. The study, funded by the National Institutes of Health and conducted by researchers at New York-Presbyterian Hospital and Columbia University Irving Medical Center in New York City, looked at 1,376 consecutive patients who showed up at the emergency room with symptoms of coronavirus. Nearly 60%, or 811 of the patients, received the drug within 48 hours and were found, on average, to be more severely ill than those who didn’t receive the drug, the researchers said. They said the study’s findings didn’t find any potential benefit or harm from the drug, adding a rigorous, randomized clinical trial is needed.