Authorities on Friday reported 19,851 cases and 240 fatalities, taking total confirmed infections past 1 million and deaths to 8,826.

Thailand had kept the coronavirus largely under control and enjoyed only partial social restrictions for much of the pandemic until it was hit in April by the virulent Alpha variant, followed later by the Delta variant, at a time when few people were vaccinated. Health officials have been rushing to shore up vaccine supply having inoculated just 8.3% of its population of over 66 million.

Authorities are also mixing AstraZeneca and Sinovac shots to boost immunity and as a workaround for supply issues. The government's handling of the coronavirus crisis, including its vaccination policy, has fuelled a recent revival of protests against Prime Minister Prayuth Chan-ocha, who has stood by his administration's strategy.