However, the Committee was very concerned by the increase in WPV1 cases globally in 2018, especially regarding the increased number of WPV cases in Afghanistan.
Furthermore, after a 10-month period of no international spread of wild poliovirus between the two neighbours, Pakistan and Afghanistan, cross border spread in both directions has occurred in the last three months.
2504
巴基斯坦2018年的病例状况停滞不前，2018年迄今为止的病例数与2017年全年持平。
In Pakistan the situation in 2018 has stagnated, with the number of cases so far at the same level in 2018 as for the whole of 2017.
Furthermore, positive environmental isolates in 2018 continue to be widely spread geographically indicating multiple areas of transmission and missed susceptible population groups.
2506
尽管如此，消灭脊灰规划在补充免疫活动的质量等方面已出现一定改善。
Nevertheless, the performance of the eradication program has shown some improvement in areas such as SIA quality.
2507
在阿富汗，2018年的脊灰病例数几乎翻了一番，迄今为止报告的病例数为19例，而去年同期仅有10例。
In Afghanistan, the number of poliocases has almost doubled in 2018, with 19 cases reported so far, compared to 10 at the same time last year, due to worsened security and greater inaccessibility, and persistent pockets of refusals and missed children.
Environmental surveillance is also finding an increased proportion of positive samples.
2509
环境监测同样发现阳性样本比例上升。
The security situation and access would need to significantly improve for eradication efforts to progress, as currently 1 million children under 5 years old are inaccessible in recent polio immunization campaigns.
It is now more than two years since the last WPV1 was detected in an accessible area of Nigeria, and four years since there has been any international spread of WPV1 from the country.