Many theories abound as to what could have caused the outbreak, including contaminated high-touch surfaces, the elevators or Airbnb units in the 25-storey building. Raugust said the building's Airbnb units have been open for business and rented throughout the COVID pandemic in Calgary. "First of all, I don't think Airbnb should be operating in this building right now. "This is the third time that I've had to self-isolate from cleaning Airbnb." Raugust and Hu did agree completely on one thing — the importance of wearing masks.

Source: CBC News June 30, 2020 17:48 UTC