CAPE TOWN: South Africa said Tuesday it would offer its doses of the Oxford/AstraZeneca Covid-19 vaccine to the African Union after scrapping their use due to efficacy concerns.

The country suspended its vaccine rollout -- meant to begin with the AstraZeneca shots earlier this month -- after a study found the jab failed to prevent mild and moderate illness caused by a variant found in South Africa.

"The doses we purchased have been offered to the African Union to distribute to those countries who have already expressed interest in acquiring the stock," Health Minister Zweli Mkhize told parliament.

"There will be no wasteful and fruitless expenditure."

The continent's hardest-hit country by the pandemic had acquired a million doses of Covishield, a copy of the AstraZeneca vaccine made by the Serum Institute of India, and was set to receive an additional 500,000.

The African Union (AU), through its African Vaccine Acquisition Task Team, has secured some 270 million doses of anti-Covid vaccines for the continent and last week said it would not "walk away" from the AstraZeneca formula.

It recommended countries where the more contagious South African variant has not been detected should proceed with the rollout.

Malawi has already said it will forge ahead with its purchase of the jabs, although the delivery dates have not yet been confirmed.

South Africa has now settled for the Johnson & Johnson vaccine, securing nine million doses, including 80,000 delivered late on Tuesday.

"The first batch of Johnson & Johnson Covid-19 vaccines have arrived at OR Tambo International Airport," Mkhize tweeted as the precious cargo landed in the financial capital Johannesburg.

The jabs, only recently approved by the national health products authority, are expected to be distributed to various vaccination centres overnight.

Inoculation will begin with healthcare workers as part of an implementation study.