The National Vaccine Institute will sign a US$6 billion (182 billion baht) forward contract for Covid-19 vaccines with British-Swedish producer AstraZeneca tomorrow.
Under the contract, Thailand will order 26 million doses of vaccine, enough for 13 million people.
Prime Minister Prayut Chan-o-cha will preside over the ceremony, deputy government spokeswoman Traisuree Taisaranakul said yesterday.
The contract is subject to the condition that Thailand might or might not receive the vaccine, depending on research results and other factors, Ms Traisuree said.
Ms Traisuree added the contract would cover vaccine production in Thailand at Siam Bioscience Group's plant.