The young woman and her sister had traveled across Europe just as the coronavirus pandemic was taking off there, visiting Milan and Paris before heading to London.
원문출처 : https://www.cnn.com/2020/09/18/health/coronavirus-airline-transmission-studies/index.html
원문출처 : https://www.cnn.com/2020/09/18/health/coronavirus-airline-transmission-studies/index.html