Cold chain is a set of rules that ensure proper storage and distribution of vaccines from national to sub centre levels
Cold chain equipment consists of
1. Walk in cold rooms
● Located at regional level
● Serve 4-5 districts
2. Deep freezers
● At district level
● Temperature maintained between -15 to -25 degrees
● Can maintain temperature for 18 - 22 hours in case of power failure
3. Ice lined refrigerators (ILR)
● At PHC level
● Temperature maintained at 2 - 8 degree Celsius
4. Cold boxes
● Supplied to peripheral centres for vaccine transportation
5. Vaccine carriers
● For outreach sessions
Hold over time of cold chain equipment depends on:
● Ambient temperature
● Number of frozen ice packs kept
● Frequency of opening
● Quantity of vaccine kept inside
● Condition of icepack lining
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