Also, the graph shows that although Delta is waning as the dominant strain in Alberta, what explains the drought for usĀ in November and December?
Figure 28: Variant of concern COVID-19 cases in Alberta by day. Note: cases are identified as COVID-19 positive prior to being identified as a variant of concern. Data included up to end of day January 10, 2022.
https://www.alberta.ca/stats/covid-19-alberta-statistics.htm#variants-of-concern