The Weekly Epidemiological Record (WER) for 4 June 2010, vol. 85, 23 (pp 213–228) includes: Polio vaccines and polio immunization in the pre-eradication era: WHO position paper. http://www.who.int/wer/2010/wer8523.pdf

In a posting, WHO noted:

“A new position paper covering routine polio immunization in the pre-eradication era, particularly in developing country settings, was published today in the WHO Weekly Epidemiological Record. The position paper includes information on the types of polio vaccine available, and their safety, immunogenicity, field efficacy and cost-effectiveness. It concludes with policy recommendations.

“Prior to polio eradication, national immunization schedules should include either oral polio vaccine, inactivated polio vaccine, or a combination of both. Vaccine decisions should be based on assessments of the potential for importation of wild poliovirus (WPV) and subsequent transmission. High immunization coverage is essential to ensure adequate population immunity. As long as WPV transmission has not been interrupted everywhere, all polio-free countries and areas remain at risk of re-importation, particularly from the remaining polio-endemic countries.

http://www.who.int/immunization/newsroom/news_routine_polio_immunization_position_paper_2010/en/index.html