The UK's launching a review into so-called 'Vaccine Passports' for covid-19, but says they would not be appropriate in all circumstances.
The review forms part of Prime Minister Boris Johnson's 'roadmap' out of lockdown restrictions.
Discussions had already started between the UK and countries looking at requiring vaccination certificates for international travel to resume.
Health Secretary Matt Hancock says such a scheme will not be mandatory across the domestic economy.
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