The impact of shifting demographics, variants of concern and vaccination on outcomes during the first 3 COVID-19 waves in Alberta and Ontario: a retrospective cohort study.
CMAJ Open. 2022 Apr 26;10(2):E400-E408. doi: 10.9778/cmajo.20210323. Print 2022 Apr-Jun.
CMAJ Open. 2022.
PMID: 35473827
Free PMC article.