Trial of Moderna Covid-19 Vaccine Delayed, Investigators Say, but July Start Still Possible

July 3, 2020

(STAT News) – A 30,000-patient trial of Moderna’s coronavirus vaccine candidate, expected to start next week, has been delayed, a potential hurdle in the company’s ambitious effort to deliver key data by Thanksgiving. Moderna is making changes to the trial plan, called a protocol, which has pushed back the expected start date of the Phase 3 study, according to investigators. The investigators, who spoke on condition of anonymity, emphasized that protocol changes are common but said it’s not clear how long the start will be delayed.