The Smittestop app is regarded as a supplement to manual contact tracing in Denmark, which is conducted by the Danish Patient Safety Authority (Styrelsen for Patientsikkerhed). She added that because Google and Apple, who developed the Danish app, update it on an ongoing basis, it was not currently possible to say whether the error has always existed. “We can see that in some cases, where mobile phones are together for a longer period, for example people who live together, close contacts don’t get a (possible) infection notification,” Ærbo said. Technical staff are working to confirm the error before releasing an update, according to the broadcaster’s report.

“We have recently tested the app to recreate the situation and appear to have found a possible cause for (the error),” Lene Ærbo, the technical leader of the app for the Danish health ministry, told DR. Similar situations have subsequently been reported in other media in Denmark. Newspaper Politiken has reported that Copenhagen city councillor Pia Allerslev found that her family did not receive warnings from the app even though she tested positive for Covid-19 and had been close to them for over 15 minutes, the requirement for the notification. It is currently unknown whether the issue has been present since the app was launched in June, according to DR. The technical problem may have caused certain users not to be notified they have been close to a person infected with coronavirus, when in fact this was the case.

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