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Table 1 Characteristics of reported cVDPV2 cases from north and south Yemen, 2021–2022

From: Circulating vaccine derived polio virus type 2 outbreak and response in Yemen, 2021–2022, a retrospective descriptive analysis

 

Whole country

North

South

Cases of cVDPVs

Characteristics

No.

%

No.

%

No.

%

227

100%

195

86%

32

14%

Year

      

2021

65

29%

40

21%

25

78%

2022

162

71%

155

79%

7

22%

Age group

      

< 5 Ys

207

91%

179

92%

28

88%

> 5 Ys

20

9%

16

8%

4

12%

Sex

      

Male

142

63%

124

64%

18

56%

Female

85

37%

71

36%

14

44%

IPV in RI

      

Zero dose

187

82%

158

81%

29

91%

One dose

40

18%

37

19%

3

9%

Main AFP surveillance indicators

Years

NPAFP rate

6.6

%ADEQ

87.5%

NPAFP rate

6.7

%ADEQ

87%

NPAFP rate

6.4

%ADEQ

88.5%

2021

5.5

88%

5.6

87%

5.3

89%

2022

7.7

87%

7.8

87%

7.4

86%

  1. NPAFP; non polio acute flaccid paralysis/100,000 population < 15 years, ADEQ; # of AFP cases with 2 stool specimens collected > = 24 h apart and < = 14 days of onset, RI: Routine Immunization, IPV: Inactivated Polio Vaccine