I don't get why people are so afraid of the VaaS model (vaccine as a service). If we already buy all our entertainment on a monthly basis, then I don't see an issue in mandating quarterly or biannual immune system boosters to protect against the virus. Vaccine passports are a different issue. I would probably sign up for VaaS, but governments could use mandates aggressively, and it's not far off to imagine how people end up in concentration camps from there. As Plato put it, democracy ends in tyranny, so this is to be expected/embraced