This free card is allows EU citizens to access state-provided healthcare while on holiday in the EU countries plus Iceland Lichtenstein, Norway and Switzerland. That’s Social Europe‘s promotional video for it above.
A leaflet about this is available electronically from the EU Bookshop or can be picked up from the EDC office.
UK citizens can apply for the card for free by going here.
An app containing lots of useful information on how to use the card and what it covers is available from the App Store (for iPhone owners), Google Play (for Android users) and the Windows Marketplace (for those with phones running Windows)