The sixth shipment of COVID-19 vaccines from Chinese pharmaceutical firm Sinovac arrive at the Santiago international airport in Santiago, Chile, March 21, 2021. (Chilean Ministry of Health/Handout via Xinhua)

Chilean Minister of Health Enrique Paris speaks at a press conference welcoming a new batch of COVID-19 vaccines from Chinese pharmaceutical company Sinovac at the Santiago international airport in Santiago, Chile, March 21, 2021. The Chilean government on Sunday received a sixth shipment of COVID-19 vaccines from Chinese pharmaceutical firm Sinovac. (Chilean Ministry of Health/Handout via Xinhua)