또 "환자들의 발병일과 층별·입원실별 발병률 등이 조금 다른데 그 부분에 대해 조사를 좀 더 진행해야 된다"고 덧붙였다.
He also added, "The date of the patient's outbreak and the rate of occurrence by floors and hospital rooms are slightly different, and we need to conduct more investigation on that part."