https://en.m.wikipedia.org/wiki/Variants_of_SARS-CoV-2

This is very interesting & surprisingly informative, except for one thing: in all these variants & over 100 references cited, they don’t bother to tell you that the extent of sequence alterations are all TRIVIAL. A fraction of 1% of residues changed.

And no, it’s not true that a tiny change might be important, not in this case.

We already know three, really important things:
1. Anyone immune because they’re been infected or vaccinated has circulating T-cells which recognise ALL THE VARIANTS TESTED. That’s published research.
2. Everyone tested who’d been infected by SARS in 2003 retained immune memory to that virus, a whole 17 years later.
3. All blood donors who’d survived SARS also had T-cells which recognised the new virus, SARS-CoV-2. These two viruses are only 80% identical, so a difference of 20%, yet our immune systems has absolutely no difficulty recognising that they’re close relatives.

The conclusion is that if even 20% differences are nowhere…