Those diseases are caused by bacteria or viruses in contaminated drinking water or food, in sewage and among people who lack clean water to wash their hands.
Those diseases are caused by bacteria or viruses in contaminated drinking water or food, in sewage and among people who lack clean water to wash their hands.
而这些疾病都是通过不干净的饮用水和食物上携带的细菌和病毒来传播的，在没有干净水洗手的人群中，疾病便更容易传播。