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Table 2 Polio surveillance performance indicators by state pre and during the outbreak in South Sudan

From: A circulating vaccine-derived poliovirus type 2 outbreak in a chronic conflict setting: a descriptive epidemiological study in South Sudan – 2020 to 2021

S/N

State

No of Counties

Counties affected

Total cVDPV2  cases reported

Source of cVDPV2

Non-polio AFP rate Per 100,000 population < 15 yrs.)

State Stool

Adequacy

Rate

No. of compatible  cases 2019–2020

Percentage of counties with OPV3 coverage > 80% in 2019 (preoutbreak)

No. of silent  counties in 2019

Both indicators meeting 2019–2021

Counties meet > = 3/100,000 children < 15 years in 2020

Counties meet > = 3/100,000 children < 15 years in 2021

2020

2021

AFP samples

ES samples

2019

2020

2021

2019

2020

2021

1

Central Equatoria

6

2

5

2

7

5

3.6

3.8

6.3

93

97

95

0

17

1

10

3

6

2

Eastern Equatoria

8

2

1

1

2

0

4.3

6.8

6.5

93

83

94

1

0

0

8

6

8

3

Jonglei

11

4

4

2

6

0

4.1

4.2

8.6

72

54

83

10

0

1

7

8

11

4

Lakes

8

4

4

0

4

0

9.8

7.5

5.6

94

95

94

0

38

0

6

8

8

5

Northern Bahr El Ghazal

5

3

4

0

4

0

5.8

4.4

5.8

82

81

89

2

20

0

6

2

5

6

Unity

9

4

5

2

7

0

11.2

9.1

14.3

85

80

93

4

0

0

6

7

9

7

Upper Nile

9

2

1

2

3

0

5.5

6.3

8.5

88

78

97

2

8

1

3

10

11

8

Warrap

7

3

17

1

18

0

6.7

8.3

9.0

96

91

92

2

14

0

3

5

7

9

Western Bahr el Ghazal

3

3

7

0

7

0

11.6

12.4

16.1

93

94

85

0

0

0

3

3

3

10

Western Equatoria

10

1

1

0

1

0

8.2

7.1

7.9

100

91

92

1

70

0

3

8

9

 

National

80

28

49

10

58

5

6.3

5.6

8.2

90

84

91

22

18

3

55

60

77