The European Commission has launched an EU-wide system to link national Covid-19 contact tracing apps together in its latest effort to slow down the coronavirus pandemic.
Following testing in different EU countries earlier this autumn, the bloc's executive arm said the system got under way with three national apps - Germany's Corona-Warn-App, Ireland's COVID tracker and Italy's immuni - now linked through the so-called interoperability gateway.
According to the European Commission, these three apps have been downloaded by around 30 million people, the equivalent of two-thirds of all tracing app downloads in the EU.
Contact tracing apps have been developed to break contagion chains by alerting people if they have been near someone who has been infected.
As coronavirus cases continue to surge across the EU, the new system ensures that national apps can work in all the countries willing to join the scheme, as users only need to install one app also compatible in other participating nations.
In total, the commission said tracing apps from 20 member states could be linked via the system.
"Many member states have launched voluntary contact tracing and warning apps, and the commission has supported them in making these apps safely interact with each other," said Thierry Breton, the commissioner for single market.
"Free movement is an integral part of the single market, the gateway is facilitating this while helping save lives."
The EU said all information generated by the apps does not allow the identification of users and is not kept after infections are traced back.