Students at the University of British Columbia have come up with a wearable device they claim can detect a drug overdose. The device is worn on a person’s wrist, with a wire connecting to a sensor on their fingertip, which then detects when a user has stopped moving and breathing. The device would then sound an alarm if a person’s vital signs fell below a certain threshold, and alert others to a possible overdose. Tests will be conducted in Vancouver’s Downtown Eastside next week.