Saturday, 24 October 2009
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Dear Sir Good day. I have faced one question regarding NIDs, which is: if one of the governorates or provinces in any country achieves a routine immunization coverage rate of more than 95%, is there need to proceed with NIDs? This question was raised in Iraq. My first response: I reminded him (of our experience) with the Polio Eradication Strategy. Then he insisted that he achieved routine coverage of more than 95% and AFP surveillance. Then I clarified that it depended on national strategies and that it would depend on how long the coverage rate has been more than 95% and what is the population density of the governorate and if it is isolated geographically from other governorates— all these 3 factors affect the decision to stop PNIDs in any governorate and this is a decision to be taken at the national not the provisional level. Regards Riadh M B CH B DCM +964 780 1011077 +964 770 2763418
14 years ago
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#1630
Riadh, I totally agree with you on the clarification.The aim of Polio Eradication Strategy is to reach all the children under five years. By doing so we give a chance to those children who were not reached during the Routine Immunization. Children who were not reached during RI are obvious unvaccinated. This group accumulates every year. Depending on RI target population, 5% of children who were unvaccinated in five years can be enough to create outbreak. Example of countries with target population in some of provinces of 500,000 this means 25,000 children are unvaccinated per year. For five years, then you have 125,000 children. I am not an expert on sero-conversion of OPV but obviously there is a certain % who don’t seroconvert and we need to reach them. I agree that the province maintain the coverage of 95% for longer period and have moderate target population, then they will have a longer period of honey moon but at certain point they need to do NIDs to reach all unvaccinated children during RI and missed children during the previous NIDs. Chris
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