According to Bloomberg, Belgium's app that verifies coronavirus vaccinations reported a data leak, just days before Brussels is set to require people to show their COVID-19 pass in order to enter restaurants. A potential leak of the CovidScan app may have exposed the sensitive health data of 39,000 people, according to the Belgian data protection authority. The app is used to read the QR codes - usually on a phone - that prove people have received a vaccine or have recently tested negative for the virus.