第二 ， 當然就係因為 當中有啲人因為個病而變咗殘疾 普遍率大概係 4 % 到 5 % 即二十個人當中就有一個
Second, of course, because there are people who become disabled because of their illness, the prevalence rate is about 4 to 5 percent, that is, one in 20 people