Hundreds of Thai Medical Workers Infected Despite Sinovac Vaccinations

A health worker prepares to administer the COVID-19 CoronaVac vaccine, developed by China's Sinovac firm, at a makeshift clinic at Saeng Thip sports ground in Bangkok, Thailand, on April 7, 2021. Mladen Antonov/AFP via Getty Images

BANGKOK—Thailand’s health ministry said on July 11 that more than 600 medical workers who received two doses of China’s Sinovac vaccine have been infected with COVID-19, as authorities weigh giving booster doses to raise immunity.

Of the 677,348 medical personnel who received two doses of Sinovac, 618 became infected, health ministry data from April to July showed. A nurse has died and another medical worker is in critical condition.