An overview of key challenges that need to be addressed to make Europe's various COVID-19 contact tracing apps interoperable for cross-border travel (Natasha Lomas/TechCrunch)

Natasha Lomas / Heaven32: An overview of key challenges that need to be addressed to make Europe’s various COVID-19 contact tracing apps interoperable for cross-border travel  —  A major question mark attached to national coronavirus…

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