Table 1.
Seroprevalence of Poliovirus Among Infants Aged 6–9 Months, by Number of Oral Polio Vaccine (OPV) Doses Received—Kano State, Nigeria, 2014
| Dose Type, No. | Children, No. | Seroprevalence, No. (%) |
|||||
|---|---|---|---|---|---|---|---|
| PV1 | P Value | PV2 | P Value | PV3 | P Value | ||
| RI OPV doses, no. | <.001 | <.001 | <.001 | ||||
| 0 | 41 | 18 (43.9) | 11 (26.8) | 13 (31.7) | |||
| 1 | 13 | 9 (69.2) | 6 (46.2) | 10 (76.9) | |||
| 2 | 18 | 16 (88.9) | 11 (61.1) | 13 (72.2) | |||
| 3 | 20 | 14 (70.0) | 13 (65.0) | 13 (65.0) | |||
| 4 | 89 | 74 (83.2) | 66 (74.2) | 68 (76.4) | |||
| SIA OPV doses, no. | .036 | .705 | .013 | ||||
| 0 | 28 | 19 (67.9) | 15 (53.6) | 13 (46.4) | |||
| 1–3 | 57 | 37 (64.9) | 35 (61.4) | 38 (66.7) | |||
| 4–6 | 67 | 51 (76.1) | 42 (62.7) | 43 (64.2) | |||
| ≥7 | 26 | 23 (88.5) | 15 (57.7) | 22 (84.6) | |||
| Total doses, no. | <.001 | .002 | <.001 | ||||
| 0 | 6 | 2 (33.3) | 2 (33.3) | 0 (0.0) | |||
| 1–3 | 36 | 20 (55.6) | 15 (41.7) | 16 (44.4) | |||
| 4–6 | 55 | 38 (69.1) | 32 (58.2) | 38 (69.1) | |||
| ≥7 | 84 | 71 (84.5) | 58 (69.1) | 63 (75.0) | |||
Abbreviations: PV1, poliovirus type 1; PV2, poliovirus type 2; PV3, poliovirus type 3; RI, routine immunization; SIA, supplementary immunization activity.