A health worker administers a dose of the Pfizer-BioNTech vaccine against Covid-19, to a man at the Medalla Milagrosa Church in Valparaiso, Chile, on April 6, 2021. Only Israel and the U.K., respectively, have inoculated a larger share of their population with at least one dose. There have also been questions raised about vaccine efficacy, given Chile's widespread use of CoronaVac, the coronavirus vaccine manufactured by Chinese firm Sinovac. Late-stage data of China's Covid vaccines remain unpublished, and available data of the CoronaVac vaccine is varied. An ambulance leaves the Carlos Van Buren Hospital, which is overwhelmed by the large number of Covid-19 positive cases, in Valparaiso, Chile on April 6, 2021.
