Dutch text "Valid QR code" on the green screen of a smartphone meaning the owner of the other phone has been vaccinated or tested negative

app, application, background, cafe, cell, check, check in, code, concept, corona, corona certificate, corona virus, coronacheck scanner, coronavirus, covid, covid-19, device, digital, display, dutch, electronic, european, green, hand, health, health passport, holiday, holland, identity, immune, international, internet, mobile, pass, passport, phone, qr, qr code, restaurant, scan, technology, test, the netherlands, travel, vacation, vaccinated, vaccination, valid, validity, virus,