From coast to coast, pediatricians in the United States say this year's flu season ranks among the toughest they've seen.
원문출처 : http://www.cnn.com/2018/02/09/health/pediatricians-talk-flu/index.html
원문출처 : http://www.cnn.com/2018/02/09/health/pediatricians-talk-flu/index.html