"asking users to log in with Office 365 credentials in order to register for vaccination"
Wow. That's actually a good move. I'm sure many, many sheeple did so without even blinking. Of course your Office 365 credentials are a valid indicator of your real-life identity. Isn't your name in it ? And your email ? And password ?
Obviously these are things a doctor will need before he jabs the needle in.
My God we can't colonize other stellar bodies too soon. I want a place on Ganymede.