https://www.reuters.com/article/us-health-coronavirus-eu-apps/virus-tracing-apps-must-not-be-used-for-mass-surveillance-eu-says-idUSKBN22Q1KA >COVID-19 contact-tracing apps must only be used during the pandemic and will need to be automatically de-activated once the crisis is over, EU justice commissioner Didier Reynders said on Thursday in a bid to allay concerns over state surveillance.