It seems logical to me that the term "herd immunity" is a bit of a
misnomer. If 70% of the populace has anti-bodies, that leaves 30% who
are still capable of getting infected if exposed. So what kind of
immunity is that? Better to get vaccinated in my opinion assuming
that the vaccine is safe and effective. I think the experts use herd
immunity to imply that the risk of rapid spreading is statistically
reduced.
I never get flu shots and I'm reluctant to get whatever they come up with.