I'll try not to annoy the moderators this time, but I do think this needs to be explained in Epidemiological terms, rather than European politics. With the increasing number of variants being discovered , and the lack of knowledge about how effective the vaccines will be against existing and emerging virus subtypes, we might not have the light at the end of the tunnel that we had hoped for.
Yesterday, the British press were up in arms about travel bans to Europe because of the new variant Covid-19 now sweeping through the UK (And that, sadly, is not hyperbole). The suggestion is that Europe was trying to punish the UK over Brexit.
Now we have another new strain, from South Africa, and the UK has put a travel ban on all non UK residents returning from the country. Surprisingly, no newspaper is suggesting that Britain is punishing South Africa for anything.
Early reports about the South African strain are moderately worrying in that they are reporting very high "Viral Load" - number of particles in human secretions - as we know that high numbers of deaths among health care staff are tied to high levels of virus particles shed in ICU wards.