Table 2.

Performance of the Auto-Visual Acute Flaccid Paralysis Detection and Reporting (AVADAR) system compared with the traditional system of reporting acute flaccid paralysis cases from August 1, 2017, to July 31, 2018.

Country	Expected number of reports	Total number of reports received	Completeness (%) of reports received	Expected number of alerts investigated	Number of Investigations done	Investigation (%) of alerts received	Expected number of AVADARa AFPb cases	Number of AVADAR AFP cases	Proportion (%) of AVADAR AFP cases	Expected annual number of AFP cases in AVADAR districts	Number of AFP cases reported by the traditional surveillance system
Nigeria	235,767	135,129	57.31	2562	2385	93.09	2385	589	24.70	45	279
Chad	35,558	22,833	64.21	12,321	12,103	98.23	12,103	119	0.98	23	48
Cameroon	37,266	26,880	72.13	2050	1946	94.93	1946	96	4.93	40	34
Niger	23,236	18,498	79.61	1005	986	98.11	986	103	10.45	24	85
Liberia	29,051	19,855	68.35	1888	1615	85.54	1615	15	0.93	20	0
Sierra Leone	38,009	32,667	85.95	416	393	94.47	393	27	6.87	16	15
Democratic Republic of Congo	30,467	20,582	67.55	4593	4518	98.37	4518	432	9.56	56	24
South Sudan	4247	3932	92.58	197	196	99.49	196	33	16.84	14	6
All countries	433,601	280,376	64.66	25,032	24,142	96.44	24,142	1414	5.86	238	491

^aAVADAR: Auto-Visual Acute Flaccid Paralysis Detection and Reporting.

^bAFP: acute flaccid paralysis.