Table 5.
Maximum monthly storage volume for routine and SARS-CoV-2 vaccines by quartile of African Region country storage capacity
| Lower range capacity | 25th percentile capacity | 50th percentile capacity | 75th percentile capacity | Upper range capacity | ||
|---|---|---|---|---|---|---|
| Country vaccine storage capacity | % of total country capacity | volume (L) | volume (L) | volume (L) | volume (L) | volume (L) |
| Total country capacity | 100.0% | 38,403 | 173,159 | 237,433 | 304,609 | 1,605,826 |
| National level | 32.6% | 12,535 | 56,519 | 77,498 | 99,424 | 524,142 |
| Subnational level | 67.4% | 25,868 | 116,640 | 159,935 | 205,185 | 1,081,685 |
| National level maximum monthly vaccine volumes | Vaccine volume (L) | % of national level capacity | % of national level capacity | % of national level capacity | % of national level capacity | % of national level capacity |
| Routine immunization | 139,161 | 1110.2% | 246.2% | 179.6% | 140.0% | 26.6% |
| ≥65 years (SARS-CoV-2) | 2,137 | 17.0% | 3.8% | 2.8% | 2.1% | 0.4% |
| Chronic diseases (SARS-CoV-2) | 7,264 | 57.9% | 12.9% | 9.4% | 7.3% | 1.4% |
| HCWs (SARS-CoV-2) | 89 | 0.7% | 0.2% | 0.1% | 0.1% | <0.1% |
| All risk groups combined (SARS-CoV-2) | 8,216 | 65.5% | 14.5% | 10.6% | 8.3% | 1.6% |
| Subnational level maximum monthly vaccine volumes | Vaccine volume (L) | % of subnational level capacity | % of subnational level capacity | % of subnational level capacity | % of subnational level capacity | % of subnational level capacity |
| Routine immunization | 57,472 | 222.2% | 49.3% | 35.9% | 28.0% | 5.3% |
| ≥65 years (SARS-CoV-2) | 1,598 | 6.2% | 1.4% | 1.0% | 0.8% | 0.1% |
| Chronic diseases (SARS-CoV-2) | 5,433 | 21.0% | 4.7% | 3.4% | 2.6% | 0.5% |
| HCWs (SARS-CoV-2) | 67 | 0.3% | 0.1% | 0.0% | 0.0% | <0.1% |
| All risk groups combined (SARS-CoV-2) | 6,145 | 23.8% | 5.3% | 3.8% | 3.0% | 0.6% |
Notes:
We developed a vaccine flow-down schematic (Supplemental Figure 1) to depict the routine vaccine doses maintained at each immunization system level by month and used it to calculate the total monthly vaccine doses and volumes stored throughout the immunization system. This table uses the maximum monthly national level (month 10) and subnational level (month 11) vaccine storage volumes from the schematic.
The vaccine storage capacity for Gavi-eligible African Region countries was standardized by dividing by the <2 years country population in 2017. The quartiles and upper range values were calculated and then applied to the simulated African country. We used the median percentage of national level stores to total stores (32.6%) and health facility stores to total stores (34.9%) from the same data set for the analyses.
Immunization system assumptions are in Table 2.