I think that once people realise that they require a vaccine certificate to travel to Spain or Greece for their 2 weeks of sun, then the demand for such certificates will be so great that any considerations of privacy will be dropped.
There is plenty of previous history supporting vaccine certificates, some countries still require a proof of Yellow Fever vaccination, Smallpox certificates were very coo only required before the disease was eradicated by Vaccination.
I don’t really see what the fuss Is about, many countries I wouldn’t wish to travel to without making sure that my Hepatitis/Polio/tetanus shots were up to date. I need a Passport to travel and a driving license to drive......what’s so difficult about a vaccine certificate
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