Chilean Health Minister Enrique Paris (R) and advisor to the Undersecretariat of Public Health Rafael Araos (C) attend a press conference on CoronaVac's effectiveness in Santiago, Chile, April 16, 2021. The CoronaVac vaccine developed by Chinese pharmaceutical firm Sinovac is up to 67 percent effective in preventing symptomatic COVID-19, Chile's Ministry of Health said on Friday. (Chilean Health Ministry/Handout via Xinhua)
