Peru's President Pedro Castillo receives a dose of China's Sinopharm COVID-19 vaccine in Lima, capital of Peru, on Aug. 6, 2021. Pedro Castillo on Friday expressed confidence in China's Sinopharm COVID-19 vaccine after receiving his dose. (Andina via Xinhua)

Peru's President Pedro Castillo receives a dose of China's Sinopharm COVID-19 vaccine in Lima, capital of Peru, on Aug. 6, 2021. Pedro Castillo on Friday expressed confidence in China's Sinopharm COVID-19 vaccine after receiving his dose. (Peruvian Presidential Press/Handout via Xinhua)

Peru's President Pedro Castillo presents his vaccination certificate after receiving a dose of China's Sinopharm COVID-19 vaccine in Lima, capital of Peru, Aug. 6, 2021. Pedro Castillo on Friday expressed confidence in China's Sinopharm COVID-19 vaccine after receiving his dose. (Peruvian Presidential Press/Handout via Xinhua)

Peru's President Pedro Castillo receives a dose of China's Sinopharm COVID-19 vaccine in Lima, capital of Peru, on Aug. 6, 2021. Pedro Castillo on Friday expressed confidence in China's Sinopharm COVID-19 vaccine after receiving his dose. (Andina via Xinhua)