The "new normal" may be just not shaking hands, not automatically hugging & kissing friends/relatives, more acceptance of masks on public transport, greater use of tissues or hankies for catching coughs/sneezes, no spitting in public, more awareness of personal space, etc. Easy things like that could well keep the disease controlled to manageable numbers.
I think that that level of change would be well within the perameters of human patterns of behaviour.