The Israeli study about waning vaccine immunity might not be correct. It might be a Simpsons paradox.
This would have some good and bad implications. On the plus side, if it holds, we don't need to worry so much about boosters and just really need to push that first vaccination. On the neg side, it's not so much the waning immunity which is causing the breakthroughs but the Delta itself (world may not have a choice then...UK approach or bust...short of a rapid Delta upgrade vaccine coming).
www.nytimes.com
This would have some good and bad implications. On the plus side, if it holds, we don't need to worry so much about boosters and just really need to push that first vaccination. On the neg side, it's not so much the waning immunity which is causing the breakthroughs but the Delta itself (world may not have a choice then...UK approach or bust...short of a rapid Delta upgrade vaccine coming).

Is Vaccine Immunity Waning? (Published 2021)
It may not really be waning much — which means universal booster shots may do little good.