Table 2.

Ratios of surveillance reporters to population and households in order of increasing ratio

	Event	Crisis phase	Setting	Reporters, n	Population, n	Ratio of reporters to population	Ratio of reporters to households
Chad	Hepatitis E35	Fragile	Periurban	160	65 000	1:406	1:68
Chad	Mortality19	Acute	Camp	187*	93 227	1:499	1:83
Sierra Leone	Ebola virus diesase32	Fragile	Rural or remote	7416	3 981 665	1:537	1:89
Liberia	Multiple44	Fragile	Rural or remote	2972	2 065 690	1:695	1:100
Côte d'Ivoire	Multiple24	Fragile	Rural or remote	541	501 328	1:927	1:154
South Sudan	Polio29	Protracted	Rural or remote	3228	3 703 680	1:1147	1:191
Malawi	Mortality45	Acute	Camp	135*	269 859	1:1999	1:333
Central African Republic	Malaria33	Protracted	Rural or remote	80	220 000	1:2750	1:458
Côte d'Ivoire	Ebola virus disease40	Fragile	Rural or remote	110	421 448	1:3831	1:639
Guinea	Mortality37†	Fragile	Rural or remote	46	297 919	1:400	1:1079
Central African Republic	Mortality21†	Protracted	Rural or remote	24	158 000	1:450	1:1097
Democratic Republic of the Congo	Mortality26†	Protracted	Rural or remote	34*	311 295	1:9156	1:1526
Nepal	Mortality38	Acute	Camp	6	73 500	1:12 250	1:2042

^*Inferred.

^†Sentinel site surveillance.