This is according to the National Primary Health Care Development Agency.
Executive Director of the agency, Doctor Faisal Shuaib, in a memo issued to journalists in Abuja, said the consignment is a donation from the American government.
The expected shipment will be the largest of vaccines received since the nationwide COVID-19 vaccination campaign started in March this year.
Nigeria has run out of COVID-19 vaccines after an initial four million doses of AstraZeneca, received from the COVAX facility were utilized three weeks ago.