ehm...
I don't know why such things are HIGHLIGHTED or advertised here on forum.
if you don't have EXPLICIT declaration made by some of these pharma comp. or by any other health institution, this is just a baseless and complete waste of time. More over "Vaccine" is a generic term that doesn't mean to much and I can confirm no one professional would talk in that way about "vaccine".
There is not any uses case.
Probably most of you are not aware but there are already several platform free and completely open.
Some are just for professionals, others are for every one.
of course this has been already pointed out also the issue related data....
complete waste of time and resource : CAVEAT EMPTOR!
How you gonna get the information about who is vaccinated? Most institutions wont give that data. I took 2 vaccine shots, and both times I have signed a paper, that I dont want my personal data to be disclosed for third parties. In short, only my government will know that I am vaccinated, but I am 100500% sure that they wont share it.