Why the delay? The nations waiting to see how Covid vaccinations unfold

A medical worker receives an injection with a dose of the Pfizer-BioNTech Covid-19 vaccine in Mexico
A medical worker receives an injection with a dose of the Pfizer-BioNTech Covid-19 vaccine in Mexico Photograph: Daniel Becerril/Reuters


source https://www.theguardian.com/world/2021/jan/08/why-the-delay-the-nations-waiting-to-see-how-covid-vaccinations-unfold

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