We are not being offered a vaccine again to protect us, but to control the spread and reduce the risk to those who, for whatever reason, do not have a healthy immune system. If we knew more about the immune system we could more effectively identity those at risk.
So I shall have my jab again, not because I want it, I really don’t, it may have long term consequences as yet unknown, but because I am indirectly protecting my, and other peoples children and grandchildren and keeping the pressure off the NHS.
Mike