selective pressureOne of the things that scares me regarding the current COVID situation is the concept of evolutionary selective pressure. Basically, when you have a large (vaccinated) population that is resistant to a disease mingling with a large population that is not resistant (unvaccinated), you have both a reservoir of the virus in which to propogate facing an increasing degree of selective pressure for mutants/variants that may evade the immunity mechanism.
I thought this was a nice explanation of the issue.
https://www.mpg.de/16371358/coronavirus-variants
For this reason, I think it is critical to have tools like that being developed by PMN/BCNI via Immusafe and covidimmunitypassports.com
I was really impressed that the immusafe prototype was updated so quickly to address the delta and other variants. It seems to be an agile approach.