Dominating the past year’s news has been the pandemic, mainly about the social distancing and lock-down regimes in various countries, but also the heralded way out of the Covid nightmare has been the development of vaccines that will mitigate the viral effects.
Those vaccines were delivered in record time and have been disseminated amongst the populations of a few countries, either by truck directly from the manufacturing centres or by air for speed of delivery. This has been particularly true of the Pfizer BionTech vaccine which was the first to be approved in the US and UK and, reportedly, has a shorter shelf life than other vaccines.