Varadkar doesn't expected mandatory quarantine to be lifted for all EU countries.
It will be August at the earliest before international travel resumes, according to the Tánaiste.
Leo Varadkar has said despite the EU Green Certificate likely to be developed by June, Ireland won't sign it immediately.
Leo Varadkar says there will be 6 weeks for governments to adopt the EU Green Cert which would meet the timeline he has in mind - EU announces in June, Ireland adopts in August
— Seán Defoe (@SeanDefoe) May 17, 2021
He's also said he doesn't expect mandatory hotel quarantine to be lifted for all EU countries at a cabinet meeting tomorrow.
The Tánaiste says we're still a while off international travel returning:

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