AstraZeneca PLC is preparing to file for U.S. emergency use authorization (EUA) for its COVID-19 vaccine later this month or early April after accumulating enough data to judge the inoculation's efficacy, sources with knowledge of the ongoing clinical trial told Reuters on Friday.
The British drugmaker completed enrollment in its trial of more than 32,000 volunteers in January and now has data on at least 150 cases of COVID-19, two sources familiar with the trial told Reuters.
The number of COVID-19 cases among those who got the vaccine versus infections in participants who received a placebo will show how effective the AstraZeneca shot was at preventing illness in those age 18 and over.