On August 27 local time, the U.S. Department of Health and Human Services said that Susan Monarez, director of the Centers for Disease Control and Prevention, has left her job.

In addition, Debra Horry, a medical official at the U.S. Centers for Disease Control and Prevention, said that she and Demit Daskarakis, head of the vaccine division of the U.S. Centers for Disease Control and Prevention, have resigned from the agency. (CCTV reporter Liu Xiaoqian)