I remember the children's lido at the park being shut for several months because of polio, and either my class or the whole infant school being shut for several weeks because of measles. Children with measles were quarantined at home, as were their siblings and any friends they had played with just before becoming ill.
This is what living with covid is going to be like. We will take the precautions we can, and respond to infection spikes. We now have 2 or 3 generations of adults who grew up with very little dangerous infectious disease around them. What they think is abnormal, or the new normal, is normal. This is what was normal for their parents and grandparents.