Interim estimates of 2019/20 vaccine effectiveness during early-season co-circulation of influenza A and B viruses, Canada, February 2020

Interim results from Canada's Sentinel Practitioner Surveillance Network show that during a season characterised by early co-circulation of influenza A and B viruses, the 2019/20 influenza vaccine has provided substantial protection against medically-attended influenza illness. Adjusted VE overall was 58% (95% confidence interval (CI): 47 to 66): 44% (95% CI: 26 to 58) for A(H1N1)pdm09, 62% (95% CI: 37 to 77) for A(H3N2) and 69% (95% CI: 57 to 77) for influenza B viruses, predominantly B/Victoria lineage.
Auteurs (Zotero)
Skowronski, Danuta M.; Zou, Macy; Sabaiduc, Suzana; Murti, Michelle; Olsha, Romy; Dickinson, James A.; Gubbay, Jonathan B.; Croxen, Matthew A.; Charest, Hugues; Jassem, Agatha; Krajden, Mel; Bastien, Nathalie; Li, Yan; De Serres, Gaston
Date de publication (Zotero)
février, 2020