Source: https://calgary.ctvnews.ca/calls-grow-for-alberta-to-recognize-aerosol-transmission-of-covid-19-1.5697621

CALGARY – Alberta’s healthcare system still believes it is “not clear” what role aerosol transmission plays in the spread of the COVID-19 virus for distances greater than two metres.
Alberta Health says aerosol transmission is not a predominant mode of transmission except for health care settings, when performing aerosol generating medical procedures (AGMPs) and during specific circumstances in community settings.
That is information the province has relied on since November 2020.