The United States plans a massive testing effort involving more than 100,000 volunteers and a half dozen or so of the most promising vaccine candidates in an effort to deliver a safe and effective one by the end of 2020, scientists leading the program told Reuters.

Gilead Sciences entered into licensing agreements with five generic drugmakers to make the antiviral drug Veklury (remdesivir), the first medicine shown to be effective against COVID-19, available in 127 countries.

Cobra Biologics, a manufacturer of a possible COVID-19 vaccine being developed by British scientists, may know by the end of May if the firm can make a million doses a month with a view to building stocks for commercial supply when the vaccine is approved.

Moderna Inc. and Swiss contract drugmaker Lonza Group AG said on Friday they would accelerate the manufacturing of the U.S. drug developer’s potential coronavirus vaccine.