A thought on Vaccine Passports for travel – They’re nothing new!
It's worth remembering these are nothing new. Their roots go back to the 1930s.
As air travel accelerated in the 1960s/70s, so did the requirements for travellers to carry an ICV 'International Certificate of Vaccination.' When Smallpox was extinguished in 1980, the ICV against Smallpox was terminated in 1981.
The ICV against Smallpox was a significant contributor to its eradication.
The historical precedent for a vaccination passport is only positive. For those who've been lucky enough to travel a bit, you'll likely already be carrying a vaccine record with your passport anyway.
Me - I can't wait!