The Philippines launched on Monday an ambitious drive to vaccinate nine million people against COVID-19 over three days, deploying security forces and using tens of thousands of volunteers to help administer the programme.
The immunisation campaign was scaled back from an earlier target of 15 million shots, but would still be a record in a country where vaccine hesitancy remains an obstacle and there are logistical hurdles to reach people in the sprawling archipelago.
Three million vaccinations per day is nearly four times the average of 829,000 daily shots in November. An official said news of the Omicron variant made the campaign even more vital.
"It is better to be prepared for the effects of Omicron," Carlito Galvez, the country's vaccination chief, told CNN Philippines on Monday.
The spread of the Omicron variant, which the World Health Organisation has described as a "variant of concern", has sparked global travel restrictions and rattled financial markets.
The Philippines has faced one of the worst COVID-19 outbreaks in Asia and has been slower than many of its neighbours in immunising its people. About 35.6 million people have been fully vaccinated, or a third of its 110 million population.
The country aims to immunise 54 million people by the end of 2021 and 77 million by next March.
New infections have fallen sharply to an average of 1,679 a day in November from a peak of 18,579 average daily cases in September, paving the way for a wider economic reopening.
Vaccination rates have remained uneven, with 93 per cent of the capital region's residents fully inoculated as of mid-November compared with 10.9 per cent of the predominantly Muslim regions in the southern Philippines, government data show.
The government has said it would deploy 160,000 volunteers in 11,000 vaccination sites nationwide for the three-day campaign.