Polio Eradication Officer Question:

Polio does not respect borders - any unimmunized child is at risk. For every case of paralysis there are between 200 and 1000 children infected without symptoms. So it is hard to detect polio and hard to prevent the virus from travelling. Children living in areas where immunity levels are low are particularly vulnerable. The best defence against polio importations is to eradicate the virus. Only then will all children be safe.