Hydrogel casing keeps vaccines stable without refrigeration up to 65°C

Good news! Besides vaccines it can also stabilize enzymes, diagnostics and other biologics.

"Most vaccines need to be refrigerated, which makes it difficult and expensive to get them to remote areas where they’re often needed most. Now, researchers at ETH Zurich have developed a new method for encapsulating vaccines in hydrogels so they can be transported and stored at much higher temperatures. ...
The key ingredient is a synthetic polymer called polyethylene glycol (PEG), and the resulting hydrogel encapsulates the vaccine’s proteins and keeps them separated. This allows the medicine to remain viable at room temperature and indeed, much higher – up to 65 °C (149 °F). ..."

Hydrogel casing keeps vaccines stable without refrigeration up to 150 °F

Thermal stabilization of diverse biologics using reversible hydrogels (open access)