I hope we'll look back at this period 100 years from now and just shake our heads, and hope that it's not an ongoing concern then.
I can understand being frustrated because herd immunity was touted as a possible benefit of mass covid vaccination, but that has nothing to do with whether it exists in general.
The SARS2 mRNA vaccines don’t even protect against infection, especially for Omicron variants.
You may want to reconsider your opinion.
The protection goes down over time, and it is less for many of the variants, but it is way greater than 0.
But, it is still claimed that they greatly reduce severe infection.
The point I’m trying to make is that there’s a wide range of vaccine efficacy. Current vaccines against BA4/5, very poor.
Now, my question is, since the current mRNA vaccine is causing our body to create old spike protein, and BA4/5 almost completely evades the resulting antibodies, what’s the mechanism that reduces severe disease from BA4/5?
Your body only briefly produced spike protein after vaccination. The lasting immunity isn't caused by ongoing spike protein production.
It’s not like T cell immunity has whole SARS2 virus to model against, like it does with other vaccines employing whole, inactivated virus.
mRNA breaks down within a few days, by which point spike protein production by your cells has stopped, and the spike proteins themselves break down within a few weeks.
Inactivated virus would be broken down and excreted within a similar timeframe or faster; it's the immune system memory of the proteins that it encountered that persists.