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In reality even if the vaccine is produced, you'd need the best part of 500M produced just for the EU let alone the other countries along the route. It won't be a case of individual risk as it would be today, it will still be whether countries have sufficient immunity built up to allow free movement again.
atz-
Sure, it's not a case of flicking a switch. And the timelines invariably slip backwards. But this vaccine is already being manufactured, the UK has ordered (I think) 30m doses and the EU 200m. This guy recons that, at the 90% efficacy they are reporting, only 45% of people need to have it for it to control the virus.
And the Oxford vaccine is expected to declare soon as well (we've ordered loads of that and it is being manufactured now too).
So definitely right to be cautious, but some hope of normality.
frank9755
Good news on the vaccine today, maybe it will go ahead as planned:
Life should return to normal by spring, says UK vaccine expert
https://www.theguardian.com/world/live/2020/nov/09/coronavirus-live-news-us-nears-10m-cases-as-global-infections-pass-50m?CMP=share_btn_tw&page=with:block-5fa944248f0870a6e75faf8c#block-5fa944248f0870a6e75faf8c