TABLE. Acute flaccid paralysis surveillance performance indicators, reported cases of wild poliovirus and vaccine-derived poliovirus type 2,* and percentage of environmental samples with detection of wild poliovirus type 1, by region and period ― Afghanistan, January 2020–November 2021†.
| Region | AFP surveillance indicators |
No. of WPV1 cases reported |
No. of cVDPV2 cases reported |
No. (%) of ES samples with WPV1 detected§ |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of AFP cases |
NPAFP rate (%)¶ |
% with adequate stool specimens** |
2020 |
2021 |
2020 |
2021 |
2020 |
2021 |
|||||||
| 2020 | 2021 | 2020 | 2021 | 2020 | 2021 | Jan–Jun | Jul–Dec | Jan–Nov | Jan–Jun | Jul–Dec | Jan–Nov | Jan–Jun | Jul–Dec | Jan–Nov | |
|
All regions
|
3,972
|
3,009
|
18
|
17
|
93
|
94
|
34
|
22
|
4
|
54
|
254
|
43
|
22 (11)
|
13 (6)
|
1 (0.3)
|
| Badakhshan |
83 |
61 |
12 |
10 |
89 |
93 |
1 |
0 |
0 |
1 |
0 |
0 |
0 (―) |
0(―) |
0 (―) |
| Central |
734 |
658 |
15 |
17 |
98 |
98 |
0 |
0 |
0 |
0 |
17 |
4 |
0 (―) |
1 (3) |
0 (―) |
| Eastern |
543 |
374 |
24 |
20 |
92 |
96 |
2 |
0 |
0 |
51 |
19 |
0 |
2 (2) |
2 (3) |
0 (―) |
| Northeastern |
429 |
298 |
18 |
15 |
95 |
94 |
0 |
0 |
3 |
0 |
4 |
0 |
0 (―) |
1 (20) |
0 (―) |
| Northern |
337 |
255 |
13 |
12 |
91 |
89 |
1 |
0 |
0 |
0 |
7 |
2 |
0 (―) |
0 (―) |
0 (―) |
| Southeastern |
426 |
283 |
20 |
15 |
95 |
96 |
0 |
6 |
1 |
1 |
33 |
8 |
1 (8) |
0 (―) |
0 (―) |
| Southern |
798 |
586 |
21 |
18 |
86 |
89 |
23 |
15 |
0 |
0 |
145 |
12 |
17 (26) |
7 (9) |
1 (0.8) |
| Western | 622 | 494 | 20 | 20 | 93 | 93 | 7 | 1 | 0 | 1 | 29 | 17 | 2 (29) | 2 (40) | 0 (―) |
Abbreviations: AFP = acute flaccid paralysis; cVDPV2 = circulating vaccine-derived poliovirus type 2; ES = environmental surveillance; NPAFP = nonpolio acute flaccid paralysis; WPV1 = wild poliovirus type 1.
* cVDPVs are genetically linked VDPV2 isolates for which there is evidence of person-to-person transmission within the community.
† Data as of January 11, 2022.
§ Total number of ES samples by period: January 2020–June 2020 = 208, July 2020–December 2020 = 205, and January 2021–November 2021 = 341. WPV-1–positive ES samples were detected in 2020 in Kabul (central), Nangarhar (eastern), Kunduz (northeastern), Khost (southeastern), and Helmand and Kandahar (southern) provinces, and in 2021 in Helmand (southern) province. Percentages indicate specimens testing positive for WPV1 for the total number of specimens collected for all regions and the specific region during that period.
¶ Cases per 100,000 persons aged <15 years. The surveillance performance indicator target is ≥2 NPAFP cases per 100,000 persons aged <15 years.
** Surveillance performance indicator target is ≥80% of AFP cases have adequate stool specimens collected. Adequate stool specimens are defined as two stool specimens of sufficient quality for laboratory analysis, collected ≥24 hours apart, both within 14 days of paralysis onset, and arriving in good condition at a World Health Organization-accredited laboratory with reverse cold chain maintained, without leakage or desiccation, and with proper documentation.