洗手是預(yù)防和防止傳染病蔓延的有效方法，你知道多洗手可以換回多少的生命嗎？
Hand washing is a powerful way to prevent the spread of disease. The World Bank, the United Nations and the London School of Hygiene and Tropical Medicine did a study to urge hand washing around the world. They found that one million lives could be saved each year if people washed…