It seems like vaccination info is not kept at the state or federal level. This information is no doubt extremely dangerous - imagine if a malicious actor could

It seems like vaccination info is not kept at the state or federal level. This information is no doubt extremely dangerous - imagine if a malicious actor could get ahold of the "non-vaccinated list." But right now, it's stored at high schools, universities, and workplaces around the country with standard HIPAA-grade security. As an example of what kind of government oversight I'm talking about: in Canada, there are reporting requirements for certain STD infections (including treatable ones: think chlamydia, or gonorrhea). I think some US states have reporting requirements as well. In cases like this, where there's already an active quarantine, if the CDC or the state kept track of non-vaccinated people, they could be quarantined as well. The idea being, even if they're not showing symptoms, they're at high risk for carrying the disease. This seems like a reasonable trade-off for choosing not to vaccinate yourself, and my guess is people who can't be vaccinated for medical reasons would be glad to consent to quarantine.