Germany’s health minister said Sunday that its contact tracing smartphone app will be launched this week, Reuters reported.

The app uses bluetooth short-range radio to detect and contact people at risk of infection by coronavirus and does not rely on a centralised database. Deutsche Telekom and software company SAP are involved.

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Spahn also urged people wishing to go on holiday after European border controls are eased on Monday to be careful and ask themselves whether their trip was necessary.

On Monday, Germany lifts its blanket travel warning for European Union nations and Britain, and will replace it with specific travel advice for individual countries and regions.

“We need the right balance,” Spahn said, adding that recent outbreaks in Germany after mass gatherings and church services had caused a rapid spread of the virus.