As vaccination drives gather steam across the globe, airlines and governments are scrambling to determine how best to prove inoculation of international travelers, including through the use of digital health passports. In Europe, carriers operating at a fraction of their normal spring levels are hoping plans for a digital green certificate-a document that will provide proof of a negative COVID-19 test, antibodies or vaccination-will boost confidence and convince consumers to book summer vacations. The European Commission's Digital Green Certificate will be available for free in digital or paper format, including a QR code to ensure both security and authenticity. The digital certificate will allow travelers within the EU to demonstrate that they have either recovered from COVID-19, been vaccinated or tested negative.
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