EuGeni, page-663

That's all good, happy to have a constructive discussion with you.

Here's what I found:

https://www.nejm.org/doi/full/10.1056/NEJMoa2108891

"Effectiveness after one dose of vaccine (BNT162b2 or ChAdOx1 nCoV-19) was notably lower among persons with the delta variant (30.7%; 95% confidence interval [CI], 25.2 to 35.7) than among those with the alpha variant (48.7%; 95% CI, 45.5 to 51.7); the results were similar for both vaccines. With the BNT162b2 vaccine, the effectiveness of two doses was 93.7% (95% CI, 91.6 to 95.3) among persons with the alpha variant and 88.0% (95% CI, 85.3 to 90.1) among those with the delta variant. With the ChAdOx1 nCoV-19 vaccine, the effectiveness of two doses was 74.5% (95% CI, 68.4 to 79.4) among persons with the alpha variant and 67.0% (95% CI, 61.3 to 71.8) among those with the delta variant."

BNT162b2 = Pfizer
ChAdOx1 = AstraZeneca

Whichever way you look at those results, vaccine has less effectiveness versus the delta strain. As for future vaccines, if you are going to talk about future vaccines, then you'll need to take into consideration of future strains. Delta is around 50% more transmissible than the Alpha variant, future strains will probably become even more transmissible and more deadly.

One is a cause and one is a reaction. New strains will come first, caused by mutation, then after days/weeks/months, new vaccines will come as a reaction, then a further period of vaccine rollout/adoptation. So the time between new strains and new vaccines, will cause more havoc and lockdowns.