Five million UK residents could find themselves excluded from European holidays this summer due to a bureaucratic technicality. The EU is now using a vaccine certification scheme known as the EU Digital COVID Certificate (EUDCC), which when scanned at airports and borders verifies the traveler's vaccination status and allows them to enter the country. However, only those given a dose of vaccine approved by the European Medicines Agency (EMA) will be allowed to use a EUDCC, a problem for some Brits who have been given AstraZeneca. Over 70 million doses of vaccine have been administered in the UK, but 5 million of those are the version of AstraZeneca known as Covishield, manufactured by the Serum Institute of India. Covishield is chemically identical and provides equal protection to the AstraZeneca vaccine but is manufactured in India. The revelation comes amid announcements that European countries are subjecting Brits to extra measures due to fears over the spread of the Delta variant. Italy, Spain, Portugal, France, Germany and Mala have all added extra testing and quarantine measures for British travelers. The Covishield version of the vaccine is still as effective as any other AstraZeneca jab, but this bureaucratic oversight could leave millions of fully vaccinated people unable to travel. The EMA has not approved Covishield and, although the British government has used doses manufactured in India, UK and Europe under the same name, when presented on the digital NHS app in airports the brand will be unrecognized by the EUDCC gateway. Those affected will have batch numbers 4120Z001, 4120Z002 and 4120Z003 on their patient card and NHS app. What is the EUDCC? The EU's Digital Covid Certificate gateway is a system that went live across the EU on Thursday (July 1), although some countries were already using the app in June. Countries who weren't ready for 1 July have until 12 August to gradually implement it. Previously known as the digital green pass, the EUDCC consists of information about an individual's vaccination status, test results or recovery status from COVID-19. Presented as a QR code, the traveler can choose to carry either a digital or paper certificate. Talks are ongoing to integrate the US into the app. It is expected the NHS app for UK residents will also be recognized. Airlines have warned that the EUDCC could cause chaos for travelers due to an uncoordinated approach by countries. European Medicines Agency The technicality, which could leave Brits stranded at airports, is due to the lack of approval from the EMA for Covishield. An application has never been made for approval of this vaccine by the EMA. The EMA has approved Pfizer-BioNtech, Modern, Johnson & Johnson and Oxford-AstraZeneca manufactured in the UK and EU. However, despite this, some countries have already said they will accept those vaccinated by Covishield. Germany, Spain, Austria, Slovenia, Ireland, and non-EU countries Switzerland and Iceland have said they will accept tourists who've received the jab. — Euronews