At the start of the pandemic, health departments across the country put a big emphasis on the COVID-19 mitigation method. Leaders have said it's still happening.

Since cases numbers began to climb sharply in November, however, the ability to keep up with contact tracing has been slipping. Increasingly, B.C. is unable to identify the source of each infection.

We're still practicing social distancing, and wearing masks, and local leaders are encouraging us to sign up for contact tracing. Some restaurants and businesses are doing it, and you can download ...

Rather than working out who someone with Covid-19 may have infected, a backward tracing programme tries to identify where a coronavirus patient contracted the virus in the first place.