Gilead Sciences Inc on Monday reported that its antiviral drug remdesivir provided a modest benefit in patients with moderate Covid-19 given a five-day course of the treatment, while those who received the medicine for 10 days in the study did not fare as well.
Gilead shares fell about 4%.
Remdesivir, which is administered intravenously in hospital, is the first drug to show improvement in Covid-19 patients in formal clinical trials, and new information about its efficacy is being closely watched around the world, as nations battle the pandemic.
The late stage study of nearly 600 patients evaluated the safety and efficacy of 5-