The central European country of Poland and the central African nation of Niger were among four new additions to the US Centers for Disease Control and Prevention's "very high" risk travel category on Tuesday.
원문출처 : https://www.cnn.com/travel/article/cdc-very-high-risk-destinations-november-30/index.html
원문출처 : https://www.cnn.com/travel/article/cdc-very-high-risk-destinations-november-30/index.html