用旧結核菌素試驗对于测定人体是否受过結核菌的感染与测定接种卡介苗后的免疫力是有一定价值的。但自大規模推行卡介苗接种以来,对自然感染的阳性反应与接种卡介苗后的阳轉,則很难区別。能否找出一种方法以鑑別自然感染与接种卡介苗后的变态反应是一个問題。如能解决这个問題将会給临床上及流行病 With the old tuberculin test for determining whether the human body has been infected with Mycobacterium tuberculosis and the determination of immunity after BCG vaccination is of some value. However, since the large-scale implementation of BCG vaccination, the positive reaction to natural infection and positive after BCG vaccination, it is difficult to distinguish. It is a question of finding a way to identify natural infections and allergies after BCG vaccination. If we can solve this problem will give clinical and epidemic