How should coronavirus vaccines be distributed?

As coronavirus vaccines receive approval and become available to the world, the next questions to crop up are the ethics behind vaccine distribution: Who will be the first to be vaccinated. Not only do we have to take into account which age groups to prioritize, but also which jobs. Frontline health workers around the world are already demanding better protection. And how should distribution work around the world? As it stands, rich countries are already preparing infrastructure and buying up future doses by the billions. But won’t that leave poorer countries already grappling with an adequate health care systems struggling to secure their own?