In this article it talks about how the vaccines were selected and it was based on factors such as the soundness of scientific approach and the likely speed of delivery at scale. The article also talks about how Under the agreement, all EU member states would get the first vaccines simultaneously, and doses would be allocated according to population size and this won't be enough for everyone And in the article it says It’s up to member states to decide who should be first in line for the vaccine. The European Commission has suggested prioritising people such as: healthcare and long-term care facility workers; people aged over 60; people with health conditions that make them high-risk; essential workers; people who cannot socially distance; and more socio-economically disadvantaged groups and Doses would arrive in batches rather than all at once, so the Government would have to decide who to vaccinate first.