https://www.scientificamerican.com/article/cdc-reports-second-u-s-case-of-novel-virus-spreading-in-china/ > A second case of the new infection emerging from China has been discovered in the United States—a woman who returned to Chicago from Wuhan on Jan. 13, the Centers for Disease Control and Prevention said Friday. > Dr. Nancy Messonnier, director of CDC’s National Center for Immunization and Respiratory Diseases, cautioned that the country will likely see more cases and even some domestic spread from imported cases to contacts as this quickly expanding outbreak continues.