The Lancet | Health Policy | 12 February 2021

'In this Health Policy paper, [the authors] discussed the development and production, affordability, allocation, and deployment of COVID-19 vaccines, as well as the interactions between these dimensions of the global vaccination challenge. The distinct characteristics of leading COVID-19 vaccines across each of these dimensions generate trade-offs, which mean that both globally and nationally, the availability of diversified sets of vaccine options is likely to be needed to bring the global pandemic under control.'
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(21)00306-8/fulltext