Figure 1.

Vaccine flow-down schema. Schema describes vaccine storage and movement through a country from national level to health facility level. Each box represents storage for routine immunization or for an influenza vaccination campaign. Each color represents the flow-down of a tranche of vaccines after each resupply. Reserve stock and influenza vaccines are labeled. Each box represents 1 month supply, except for the reserve stock at the Facility level, which is one-half month supply.