The Cold Chain
Today almost 60% of vaccines are thrown away because of doubts about their potency after breaks in the cold chain and possible damage from exposure to high temperatures.
World Health Organization, 1996
Thousands of miles may separate a vaccine manufacturing site and the children needing immunization. Over that distance, the vaccine must be maintained at a temperature just above freezing. National Immunization Days require a network of freezers, refrigerators, and cold boxes across the world’s jungles and deserts.
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Dropper bottle for the ink used to mark the fingers of vaccinated children
Dropper bottle for the ink used to mark the fingers of vaccinated children
Motor bikes developed for use by farmers in the Australian bush have been adapted to meet the specifications needed for vaccine delivery. Elsewhere, health workers make use of horses and even dug-out canoes to ensure that vaccine gets through to children in the remotest health system.
World Health Organization, 1996
