论文部分内容阅读
全球共有4个国家从未阻断脊髓灰质炎(脊灰)野病毒(Wild Poliovirus,WPV)的流行,阿富汗和巴基斯坦是其中两个,这两个国家都存在着病毒宿主。2008年这两个国家开展了消灭Ⅰ型WPV(WPVⅠ)和Ⅲ型WPV(WPVⅢ)的强化免疫活动,在活动中使
Four countries worldwide have never stopped the epidemic of the poliovirus (WPV), two of which are in Afghanistan and Pakistan, both of which have viral hosts. In 2008, the two countries carried out intensive immunization campaigns to eliminate type I WPV I and type III WPV (WPVIII)