Nigeria Update Epidemiology of Wild Poliovirus 23rd March 2007

Nigeria WPV cases 2007 – as at March 23, 2007 With latest onset 09-Feb-2007 Nigeria has 31 cases of wild poliovirus in 13 states in 2007, compared to 130 for the same period in 2006 in 13 states. In 2007, Nigeria accounts for 46% of the global wild poliovirus cases . Nigeria accounts for 86% of the cases in Africa. W1 (n=8) W3 (n=23) Data in WHO, Abuja as of 23-Mar-2007

2006 – 2007 Wild poliovirus Distribution Onset Feb 9, 2006/2007 W1 (n=117) W3 (n=13) W1 (n=8) W3 (n=23) # Infected States: 13 # Infected States: 13 * Onset of most recent case on 9-Feb-2006 * Onset of most recent case on 9-Feb-2007

2005 - 7 Monthly WPV Cases, * * as at 23 Mar 2007 * AFP Cases Pending Lab Results in 2007: Jan (7) and Feb (187)

2005 – 7 WPV monthly onset by type, with interventions, tOPV tOPV tOPV tOPV tOPV tOPV tOPV tOPV mOPV mOPV mOPV mOPV tOPV tOPV sNIDs NIDs IPDs

2007 Confirmed Polio Cases, ITD Pending & Virus Isolation Pending as at March 23, 2007

2006/2007 WPV1 infected LGAs By Quarter; as at 23-Mar-07 4th Qtr-2006 1st Qtr-2007 WPV1 (n=53) # Infected LGAs: 41 WPV1 (n=8) # Infected LGAs: 8

2006/2007 WPV3 infected LGAs By Quarter as at 23-Mar-07 4th Qtr-2006 1st Qtr-2007 WPV3 (n=70) # Infected LGAs: 53 WPV3 (n=23) # Infected LGAs:19

2006 - 7 WPV weekly onset

2007 WPV cases: Age and OPV status 67% < 3 yrs 45% < 3 doses

Classification of AFP cases 2005-2007 NB:- P/ITD=Pending ITD; P/PI=Pending Primary Isolation and P/Cls=Pending Classification

2006 - 2007 Wild Poliovirus onset , as at March 23, 2007