As soon as South Africa announced the spread of a new and troubling variant last week, scientists went to work.
원문출처 : https://www.cnn.com/2021/11/30/health/omicron-variant-weeks-research/index.html
원문출처 : https://www.cnn.com/2021/11/30/health/omicron-variant-weeks-research/index.html