我国流行病学解放前实际是公共卫生学中的传染病管理,解放初期才成为一门独立学科。当时流行病学只研究传染病在人群中发生、发展和消灭的规律及其预防措施。几十年来对阐明我国重要传染病的流行规律,控制或消灭我国主要传染病起了重要的作用。近几十年来发达国家部分传染病得到控制,而一些非传染病对人的威胁显得严重,故流行病学转而着重研究流行病学方法和非传染病流行病学。我国近十年来不少传染病也日 Before the liberation of epidemiology in our country, epidemic diseases were actually managed in public health and became an independent discipline in the early days of liberation. At that time, epidemiology only studied the law of occurrence, development and elimination of infectious diseases in the population and their preventive measures. For decades, it has played an important role in clarifying the epidemic law of major infectious diseases in our country and in controlling or eliminating the major infectious diseases in our country. In recent decades, some infectious diseases in developed countries have been brought under control. However, some non-communicable diseases have a serious threat to human beings. Therefore, epidemiology has turned to focusing on epidemiological methods and epidemiology of non-communicable diseases. In the past ten years, many infectious diseases in Japan have also been on the rise