The U.S. government has awarded $486 million to AstraZeneca Plc under the “Operation Warp Speed” to develop and secure supplies of up to 100,000 doses of Covid-19 antibody treatment, CNBC reported. The grant is for a preventive monoclonal antibody cocktail, especially in high-risk populations such as those over 80 years old, the U.S. Department of Health and Human Services said. The government aims to provide more than 1 million free doses upon FDA approval.