A young girl held by her mother reacts as she receives a first dose of Sinovac's COVID-19 vaccine at a health center outside Phnom Penh, Cambodia, Wednesday, February 23, 2022. Cambodia began vaccinating 3- and 4-year-olds with Chinese-made Sinovac shots Wednesday after finding young children accounting for many new infections. Prime Minister Hun Sen appealed for parents to get their children vaccinated as soon as they can. (Photo by Heng Sinith/AP Photo)
