A senior citizen receives a dose of COVID-19 vaccine from Chinese firm Sinovac in downtown Santiago, Chile, Feb. 3, 2021. Chile has launched its mass vaccination campaign against COVID-19, inoculating people over 90 years old at over 1,400 vaccination centers across the country. The campaign is being carried out with almost four million vaccines from Chinese firm Sinovac, which arrived aboard two flights last week, while more are to gradually arrive over the coming weeks. (Photo by Jorge Villegas/Xinhua)
