Yes - this seems to be the key. The developers of the Oxford vaccine have intimated today that their vaccine doesn’t appear to offer protection against the South African strain of Covid and they hope to have a modified vaccine that does in the autumn. Then I guess people will need to be vaccinated again?
Yep pretty much. I feel a very likely scenario in the future is annual Covid-19 vaccines as we already do for flu. We will most likely need to eventually reach a point where we are inoculating millions of people a day. Remains to be seen how this could be done, the NHS & pharmacies are setting a great pace right now but I'm not sure how much more headroom there is to increase the number of jabs owing to lack of trained staff and the need for those trained staff to also do their day jobs.