Table 3.
vaccine-derived polioviruses (VDPV) type-2 and circulating vaccine-derived polioviruses (cVDPV) type-2 from 2017-2022 in Cameroon
| Year of sampling | Region of sample collection | Virus category | Source of specimen | VDPV Nucleotide difference from SABIN 2 | Date of sample collection | Lineage |
|---|---|---|---|---|---|---|
| Far North | cVDPV2 | Environment | 20 | 20-Apr-19 | Nigeria | |
| Far North | cVDPV2 | Environment | 10 | 21-Oct-19 | Chad | |
| 2019 | Far North | cVDPV2 | Environment | 30 | 2-Dec-19 | |
| Far North | cVDPV2 | Environment | 7 | 16-Dec-19 | ||
| East | cVDPV2 | Infant | 18 | 14-Feb-20 | Central Africa Republic | |
| Littoral | cVDPV2 | Infant | 13 | 29-Feb-20 | Chad | |
| East | cVDPV2 | Environment | 13 | 2-Mar-20 | ||
| East | cVDPV2 | Infant | 15 | 11-Apr-20 | Central Africa Republic | |
| East | cVDPV2 | Environment | 19 | 5-May-20 | ||
| East | cVDPV2 | Environment | 19 | 2-Jun-20 | Nigeria | |
| East | cVDPV2 | Infant | 19 | 15-Jul-20 | Central Africa Republic | |
| Littoral | cVDPV 2 | Environment | 20 | 29-Jul-20 | ||
| South | cVDPV2 | Environment | 19 | 26-Aug-20 | ||
| Center | cVDPV2 | Environment | 20 | 1-Sep-20 | ||
| 2020 | South | cVDPV2 | Environment | 20 | 3-Sep-20 | |
| Center | cVDPV2 | Environment | 14 | 6-Sep-20 | ||
| Far North | cVDPV2 | Infant | 15 | 11-Sep-20 | Chad | |
| South | cVDPV2 | Environment | 21 | 29-Sep-20 | Central Africa Republic | |
| Center | VDPV2 | Environment | 6 | 16-Nov-20 | Unknown | |
| 2021 | Center | VDPV2 | Environment | 7 | 11-Jan-21 | |
| Far North | cVDPV2 | Infant | 24 | 1-Sep-21 | Nigeria | |
| Far North | cVDPV2 | Infant | 23 | 21-Sep-21 | ||
| Far North | cVDPV2 | Infant | 26 | 11-Oct-21 | ||
| Far North | cVDPV2 | Environment | 24 | 25-Oct-21 | ||
| 2022 | Far North | cVDPV2 | Infant | 38 | 2-Oct-2022 | Nigeria |
| Far North | cVDPV2 | Infant | 38 | 3-Nov-2022 | ||
| Far North | cVDPV2 | Infant | 41 | 31-Dec-2022 |