Early influenza vaccine effectiveness estimates using routinely collected data, Alberta, Canada, 2023/24 season

Author:

Smolarchuk Christa12ORCID,Ickert Carla12,Zelyas Nathan3,Kwong Jeffrey C45678,Buchan Sarah A864910

Affiliation:

1. These authors contributed equally to this work and share first authorship

2. Public Health Analytics, Alberta Health, Edmonton, Alberta

3. Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Canada

4. Dalla Lana School of Public Health, University of Toronto, Toronto, Canada

5. University Health Network, Toronto, Canada

6. Public Health Ontario, Toronto, Canada

7. Department of Family and Community Medicine, University of Toronto, Toronto, Canada

8. ICES, Toronto, Canada

9. Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Canada

10. Centre for Vaccine Preventable Diseases, University of Toronto, ON, Canada

Abstract

Timely and precise influenza vaccine effectiveness (VE) estimates are needed to guide public health messaging and impact vaccine uptake immediately. Using routinely collected laboratory, vaccination and health administrative data from Alberta, Canada, we estimated influenza VE against infection for the 2023/24 season on a near real-time basis, to late December, at 61% (95% CI: 58–64) against influenza A(H1N1), 49% (95% CI: 28–63) against influenza A(H3N2) and 75% (95% CI: 58–85) against influenza B.

Publisher

European Centre for Disease Control and Prevention (ECDC)

Subject

Virology,Public Health, Environmental and Occupational Health,Epidemiology

Reference12 articles.

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2. World Health Organization (WHO). Recommended composition of influenza virus vaccines for use in the 2022-2023 northern hemisphere influenza season. Geneva: WHO; 2022. Available from: https://www.who.int/publications/m/item/recommended-composition-of-influenza-virus-vaccines-for-use-in-the-2022-2023-northern-hemisphere-influenza-season

3. Covid-19 Vaccine effectiveness against the Omicron (B.1.1.529) variant.;Andrews;N Engl J Med,2022

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5. Estimated effectiveness of COVID-19 vaccines against Omicron or Delta symptomatic infection and severe outcomes.;Buchan;JAMA Netw Open,2022

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