This is too deep for me to understanding but I do

This is too deep for me to understanding but I do know till now we still havent reach herd immunity on flu. It has been slightly over 1 year and there are already few variants here there for Covid. Very soon, there will be even more variants so I dont have much hope on herd immunity. I have spent decades on this planet and i develop no herd immunity on any thing. Still get drunk after a bottle or two.