How does a mother in rural Indonesia get the vaccines she and her newborn need when the nearest health center is a boat ride away? How can a fragile vaccine be safely transported across waterways, countries, and continents to reach the Indonesian health center in the first place?
Maintaining the vaccine “cold chain” of proper refrigeration, from manufacturer to beneficiary, is vital for immunization programs—and extremely challenging, especially in low-resource settings.
By PATH
http://www.path.org/projects/cold-chain.php
Not too hot, not too cold: Protecting lifesaving vaccine from freezing or heat damage