A young boy, held by his father, reacts as he receive a second dose of the Sinovac's COVID-19 vaccine at a Krang Thnung health center outside Phnom Penh, Cambodia, Monday, November 15, 2021. Cambodia reopened its borders to fully vaccinated travelers Monday, two weeks earlier than planned as the country emerges from a lengthy lockdown, bolstered by one of the world's highest rates of immunization against COVID-19. (Photo by Heng Sinith/AP Photo)
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