The source cautioned that anything is possible, and the FDA decision could still come today.
The Saturday timing is in line with a meeting set for Sunday by the Advisory Committee on Immunization Practices, whose vote will inform a final decision by the US Centers for Disease Control and Prevention.
The FDA EUA allows shipping to begin, but shots still can’t be administered until the US CDC advisory committee recommends the vaccine.
The final step in the process is for CDC Director Dr. Robert Redfield to sign off on the committee recommendation. The source expects that to happen within hours of the Sunday meeting.