A single-patient study conducted by British scientists found that Gilead’s remdesivir could be highly effective against Covid-19, raising questions about previous studies that found the antiviral drug had no impact on death rates from the disease.

A clinical trial of the widely used antibiotic azithromycin in hospitalized Covid-19 patients found no convincing evidence of benefit, prompting doctors to announce that they have closed that section of the trial.

A roundup of some of the latest scientific studies on the novel coronavirus and efforts to find treatments and vaccines for Covid-19, the illness caused by the virus.

Cancer patients with COVID-19 who were treated with a drug combination promoted by U.S. President Donald Trump to counter the coronavirus were three times more likely to die within 30 days than those who got either drug alone, U.S. researchers reported.