由于科学技术的发展及预防措施的落实，一些经黄的传染病在逐渐减少或得到控制。１９７８年肆疟全球几千年的天花被消灭，ＷＨＯ推行扩大免疫规划（ＥＰＩ）以来，一些传染病如麻疹、白喉、百日咳、脊髓灰质炎等发病率明显下降，消灭第二种火第三种传染啊也指日可待。面对... Due to the development of science and technology and the implementation of preventive measures, some yellow-transmitted diseases are gradually reducing or under control. In 1978, thousands of smallpox were eliminated in the world. Since the WHO launched the EPI, the incidence of some infectious diseases such as measles, diphtheria, pertussis and poliomyelitis has dropped markedly, and the third type of fire has been eliminated Infection is just around the corner. face...