小儿麻痹症,又称脊髓灰质炎,是由脊髓灰质病毒引起的急性传染病。脊髓灰质病毒造成神经细胞不同程度的损害,以致对所支配的肌肉丧失功能造成瘫痪及畸形。解放以来,我国贯彻预防为主的卫生方针,广泛推行口服减毒活疫苗,提高人群免疫水平,本病的发病率已大大的下降。但是,近几年 Poliomyelitis, also known as polio, is an acute infectious disease caused by the poliovirus. Poliovirus causes varying degrees of damage to nerve cells, resulting in paralysis and deformity of the muscle dysfunction. Since the liberation, China has implemented the principle of prevention-oriented health and widely promoted live attenuated oral vaccines to enhance the population’s immunity level. The incidence of this disease has dropped significantly. However, in recent years