“Vaccines that do not need to be kept cool in a fridge have been successfully trialled in patients for the first time, say UK scientists.

Currently, most vaccines need to be refrigerated or frozen – but around half are wasted each year, mainly because they become unusable after getting too hot or too cold.

In the trial, which involved 60 volunteers, company Stablepharma converted a liquid tetanus-diphtheria vaccine into a 'fridge-free' version by keeping it as a dry powder for a year at room temperature before mixing it with water and injecting it.”

From BBC.