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31 May 2009 description

Executive Summary

THE YEAR 2008 witnessed a polio outbreak in Nigeria, with new international spread to bordering countries, persistent importations in south-central Africa and Sudan and the largest outbreak of polio in eight years in Pakistan. Elsewhere, western Uttar Pradesh in India - historically the world's most entrenched reservoir of polio but free of indigenous poliovirus type 1 for more than a year - was re-infected by a virus from a neighbouring state. By the end of the year, the number of children paralysed by polio in 2008 had returned to 1999 levels.