“We expect to have distributed all Sinovac doses this week,” said health official Opas Karnkawinpong, adding the programme will switch to combining the AstraZeneca vaccine with that made by Pfizer and BioNTech.
Thailand next year plans to buy 120 million COVID-19 vaccine doses in total and has already booked 60 million doses of AstraZeneca, a vaccine it manufactures locally.
Thailand has said it will only procure vaccines effective against new variants.
It has so far vaccinated 36 per cent of the estimated 72 million people who live in Thailand and hopes to reach 70 per cent by year-end.
The country is forging ahead with a quarantine-free reopening plan next month of 17 provinces to vaccinated arrivals from low risk countries. Included will be destinations like Pattaya, Hua Hin, Chiang Mai and Bangkok.
Thailand has recorded nearly 1.8 million cases and 18,336 fatalities overall, more than 98 per cent in the past seven months.