Six EU countries have begun testing technology to link national virus-tracing apps across Europe as a second wave of Covid-19 infections threatens the continent.

Axar.az reports that, the Czech Republic, Denmark, Germany, Ireland, Italy and Latvia have begun testing the new links between their tracing app servers, the European Commission said.

The new system "will ensure that apps will work seamlessly also across borders," the EU executive said.

"Users will only need to install one app and will still be able to report a positive infection test or receive an alert, even if they travel abroad," it said.

Brussels is trying to coordinate between the 27 EU capitals as they seek ways to trace victims of the coronavirus epidemic and better control new outbreaks.