Id heard that one plan would be to give out immunity certificates to those who’d already had the virus. This would be possible once there were reliable antibody tests. People with such a certificate would be able to carry on with their lives. People without one would have to stay in lockdown. I see two flaws with that idea.
Firstly, it would penalise those people who have been most diligent in social distancing.
Secondly, it would probably encourage people who hadn’t contracted Covid 19 yet to actively seek to get it, particularly if they deemed themselves to be in a low risk category.