MANILA (REUTERS) - The Philippines will buy an additional 20 million doses of the Covid-19 vaccine developed by Pfizer and BioNTech, seeking to fully inoculate more than 80 per cent of its population by mid-2022, a government official said on Sunday (Nov 28).

A deal has been signed with Pfizer, bringing the government's total purchases of the Pfizer-BioNTech vaccine to 60 million doses, said Mr Carlito Galvez Jr, who is in charge of the South-east Asian country's Covid-19 vaccine procurement.

The additional Pfizer-BioNTech doses will be used as booster shots and for paediatric vaccinations, Mr Galvez said at a virtual media briefing a day before the start of a downscaled three-day national inoculation drive.

BioNTech said on Friday it expects more data on the Omicron coronavirus "variant of concern" within two weeks to help determine whether its vaccine produced with Pfizer would have to be reworked.

Mr Galvez said the country has now received about 142 million doses of vaccines via purchases and donations.

The Philippines has so far fully inoculated more than 35 million individuals, or about 46 per cent of the targeted population, he said.

The government's goal is to inoculate 54 million Filipinos by the year end, or 70 per cent of the targeted population, Mr Galvez said.

The next goal is to hit the 77 million threshold by the end of March 2022, and then 90 million, or 82 per cent of the country's population, by the end of June, he said.

Mr Galvez said the government was looking to expand the coverage of booster shots, which currently is limited to healthcare workers and senior citizens, to include government personnel and "economic front-liners" starting next month.

The Omicron variant has not yet been detected in the Philippines, which has suspended inbound flights from South Africa, Botswana, Namibia, Zimbabwe, Lesotho, Eswatini and Mozambique until Dec 15.

On Sunday, the government expanded the restriction to include Austria, Czech Republic, Hungary, The Netherlands, Switzerland, Belgium and Italy.

It also suspended a measure allowing entry of tourists from some countries, which was supposed to be implemented on a trial basis from Dec 1.