South African health officials said Sunday they're pausing the country's rollout of AstraZeneca's coronavirus vaccine after a study showed it offered reduced protection from the Covid-19 variant first identified there.
원문출처 : https://www.cnn.com/2021/02/07/health/south-africa-astrazeneca-vaccine-study/index.html
원문출처 : https://www.cnn.com/2021/02/07/health/south-africa-astrazeneca-vaccine-study/index.html