Fridge-free vaccines on the way

Vaccines that do not have to be refrigerated could help protect millions more children in poor countries from major diseases. The “stable liquid” technology could also be used to produce vaccines that can be stockpiled in case of pandemics.
At the moment $200 to $300 million a year is spent in poor countries on the "cold-chain” – a process to keep vaccines refrigerated and protect them from extreme temperatures.
...The key to the technique is encasing the active ingredients in a vaccine in a sugary coat that preserves them at temperatures of up to 60°C. The coating is made from simple natural sugars such as raffinose and an amino acid, typically glutamine.