Demand for ultra-cold storage freezers has spiked as governments and manufacturers prepare to ship Covid-19 vaccines around the world and along the so-called last mile to those most vulnerable to the disease.
Unique characteristics of the two leading Covid-19 vaccines mean they both have to be transported frozen. The shot developed by US biotech Moderna, currently under regulatory review in the US and the EU, can survive for six months at minus 20C, the tem