The 'Cold Chain' is key to keeping the vaccine vital : health officials transport the vaccine in an insulated box to maintain the temperature controlled in each stage from manufacturer to distribution.
© UNICEF Pakistan/2011/Asad Zaidi
The 'Cold Chain' is key to keeping the vaccine vital : health officials transport the vaccine in an insulated box to maintain the temperature controlled in each stage from manufacturer to distribution.
© UNICEF Pakistan/2011/Asad Zaidi
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