kingrollo
Guru
I still have contacts in the dibble, somemof them quite senior. They in turn get their info direct from the Home Office, without the distortion or pollution of press or pundits.
Word is 6 are under development, and 4 show promise. However, they say best case scenario would be February, an a lot of things have to go right, a lot of planets have to line up the make that happen, a lot of luck imvolved.
That leaves overseas sources, which may or may not manage it quicker. Always assuming it turns out to be possible at all. My guess is there's an evens chance it'll never be viable - if it were that easy to immunise against viral infections there would have been an aids vaccine decades ago.
Key difference though is that AIDs is terminal - COVID isn't (mostly). I've heard that makes a vaccine much more feasible.