The three vaccines work on delta as well as they work on the others, especially if they were recently received.
They will not work on R.1, which has the charming quality of evading the vaccines.
If we don’t keep R.1 from spreading, all the arguments pro and con vaccines will be moot so we can stop trying.
If we don’t keep it from spreading, only new science endeavors can help us now: Either a vaccine that can’t be evaded, or other preventives or remedies.
Thanks