• Chinese Covid-19 vaccine efficacy is 'not high', official admits
• More young people hospitalized as 'stickier,' more infectious strain becomes dominant
원문출처 : https://www.cnn.com/2021/04/12/americas/brazils-covid-crisis-lockdowns-intl-latam/index.html
원문출처 : https://www.cnn.com/2021/04/12/americas/brazils-covid-crisis-lockdowns-intl-latam/index.html