Smartphone, phone, application e-Mask (eRouska), smart quarantine

Smartphone, phone, application e-Mask (eRouska), smart quarantine

Woman shows the e-Mask (eRouska) application as part of the smart quarantine system to help public health officers trace the possible personal contacts of infected patients in an easier, more efficient and faster way in Czech Republic, April 30, 2020. Thanks to Bluetooth technology, it can remember other users of eRouska whom the respective person met. (CTK Photo/Vit Simanek)

Smartphone, phone, application e-Mask (eRouska), smart quarantine

Smartphone, phone, application e-Mask (eRouska), smart quarantine

Woman shows the e-Mask (eRouska) application as part of the smart quarantine system to help public health officers trace the possible personal contacts of infected patients in an easier, more efficient and faster way in Czech Republic, April 30, 2020. Thanks to Bluetooth technology, it can remember other users of eRouska whom the respective person met. (CTK Photo/Vit Simanek)

Smartphone, phone, application e-Mask (eRouska), smart quarantine

Smartphone, phone, application e-Mask (eRouska), smart quarantine

Woman shows the e-Mask (eRouska) application as part of the smart quarantine system to help public health officers trace the possible personal contacts of infected patients in an easier, more efficient and faster way in Czech Republic, April 30, 2020. Thanks to Bluetooth technology, it can remember other users of eRouska whom the respective person met. (CTK Photo/Vit Simanek)

Smartphone, phone, application e-Mask (eRouska), smart quarantine

Smartphone, phone, application e-Mask (eRouska), smart quarantine

Woman shows the e-Mask (eRouska) application as part of the smart quarantine system to help public health officers trace the possible personal contacts of infected patients in an easier, more efficient and faster way in Czech Republic, April 30, 2020. Thanks to Bluetooth technology, it can remember other users of eRouska whom the respective person met. (CTK Photo/Vit Simanek)

Smartphone, phone, application e-Mask (eRouska), smart quarantine

Smartphone, phone, application e-Mask (eRouska), smart quarantine

Woman shows the e-Mask (eRouska) application as part of the smart quarantine system to help public health officers trace the possible personal contacts of infected patients in an easier, more efficient and faster way in Czech Republic, April 30, 2020. Thanks to Bluetooth technology, it can remember other users of eRouska whom the respective person met. (CTK Photo/Vit Simanek)