Interesting situation.
Proof of vaccination for many diseases is required for international travel.
There’ll be a short period when Covid vaccination could reasonably be required.
Not for intranational travel here though. That’d just be stupid.
Only for citizens. Illegal aliens get a pass.
108 illegal immigrants released by Border Patrol in Texas test positive for coronavirus, officials say
Texas city says it doesn’t have authority to prevent migrants who test positive from traveling elsewhere
https://www.foxnews.com/us/108-migrants-released-border-patrol-texas-positive-coronavirus
Not sure what you are talking about. I have traveled internationally for 25 years and have never have my immunization records checked