尽管全球消灭脊髓灰质炎 (脊灰 )取得了一些成功 ,2 0 0 3年历史上首次出现输入病例数多于流行地区的发病数 ,然而 ,2 0 0 4年这一趋势还要继续。由于 2 0 0 3年年中卡诺州终止了消灭脊灰的活动 ,致使起源于尼日利亚北部地区的脊灰爆发不断发生 ,造成非洲 10个无脊灰国家重新感 Despite some successes in the global eradication of poliomyelitis (poliomyelitis), the number of imported cases in 2003 was the first in history to exceed the incidence in endemic areas, yet this trend will continue in 2004. As a result of the end of polio eradication activities in Kano State in mid-2003, the outbreak of polio originating in the northern part of Nigeria continued to occur, resulting in a re-sense of the ten polio-free countries in Africa