Expanded programme on immunization


Poliomyelitis bulletin

Publication details

Number of pages: 6

Poliomyelitis surveillance is worldwide based on reporting and investigating cases of acute flaccid paralysis (AFP), rather than just “suspected poliomyelitis”, serving two specific purposes. First, AFP surveillance substantially increases the sensitivity of the surveillance system and allows it to detect the entire spectrum of paralytic poliomyelitis, both classical and atypical cases, and thus wild poliovirus transmission in a population should it occur. Secondly, AFP surveillance provides objective data with which to monitor the quality of surveillance in an individual country or large population group.

The performance of AFP surveillance (including quality of laboratory testing) and incidence of poliomyelitis tables of each country in the WHO Western Pacific Region (WPR) is being published on a bi-weekly basis to facilitate the timely global exchange of AFP surveillance data documenting how the Region is maintaining its poliomyelitis-free status.

Regional certification that indigenous transmission of wild poliovirus had stopped in all WPR countries was achieved in October 2000; the last indigenous wild poliovirus case had occurred in March 1997.

Latest issues:

Related links: