In the face of the Delta mutation, the Chinese Center for Disease Control and Prevention reminds you of these nine points! In the face of the Delta mutation, the Chinese Center for Disease Control and Prevention reminds you of these nine points! In the face of the Delta mutation, the Chinese Center for Disease Control and Prevention reminds you of these nine points! In the face of the Delta mutation, the Chinese Center for Disease Control and Prevention reminds you of these nine points! In the face of the Delta mutation, the Chinese Center for Disease Control and Prevention reminds you of these nine points! In the face of the Delta mutation, the Chinese Center for Disease Control and Prevention reminds you of these nine points! In the face of the Delta mutation, the Chinese Center for Disease Control and Prevention reminds you of these nine points! In the face of the Delta mutation, the Chinese Center for Disease Control and Prevention reminds you of these nine points! In the face of the Delta mutation, the Chinese Center for Disease Control and Prevention reminds you of these nine points!