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. 2011 Sep 13;6(9):e24673. doi: 10.1371/journal.pone.0024673

Table 2. Model Parameters and Ranges for Sensitivity Analyses.

Variable Baseline value Range or Alternative
Demand
Annual population growth rate (%) 1.45 None
Number of newborns per year 10,910 10,365–11,456
0–1 year olds per year (excluding newborns) 26,778 25,439–28,117
2–3 year olds per year 26,778 25,439–28,118
3–4 year olds per year 26,778 25,439–28,119
Population distribution across months Stochastic Fixed
Supply Chain Network and Policies
Closed vial wastage per storage period (%) 2% 1–3%
Closed vial wastage per shipment (%) 2% 1–3%
Requisition, procurement and delivery schedules (interval between events in number of days) 30 15–60
Cold Chain Equipment
Cold truck capacity (liters) 6,480 None
Cold box capacity (liters) 19 None
Vaccine carrier (liters) 5 None
Regional level cold storage capacity (liters in refrigerator) 29,461 17,330–34,660
Provincial level cold storage capacity (liters in refrigerator) 560 330–659
District health office cold storage capacity (liters in refrigerator) 638 375–750
District municipal health center cold storage capacity (liters in refrigerator) 145 86–171
District hospital cold storage capacity (liters in refrigerator) 364 214–428
Sub-district cold storage capacity (liters in refrigerator) 119 70–140
Regional level cold storage capacity (liters in freezer) 231 136–272
Provincial level cold storage capacity (liters in freezer) 349 205–410
District health office cold storage capacity (liters in freezer) 11 7–13
District municipal health center cold storage capacity (liters in freezer) 65 39–77
District hospital cold storage capacity (liters in freezer) 167 99–197
Sub-district cold storage capacity (liters in freezer) 21 13–25