Published on in Vol 8, No 1 (2019): January

Preprints (earlier versions) of this paper are available at https://preprints.jmir.org/preprint/11333, first published .
Estimating Vaccine Effectiveness Against Hospitalized Influenza During Pregnancy: Multicountry Protocol for a Retrospective Cohort Study

Estimating Vaccine Effectiveness Against Hospitalized Influenza During Pregnancy: Multicountry Protocol for a Retrospective Cohort Study

Estimating Vaccine Effectiveness Against Hospitalized Influenza During Pregnancy: Multicountry Protocol for a Retrospective Cohort Study

Allison L Naleway 1*, PhD;  Sarah Ball 2*, ScD;  Jeffrey C Kwong 3, MD;  Brandy E Wyant 2, MPH;  Mark A Katz 4, MD;  Annette K Regan 5, PhD;  Margaret L Russell 6, MD, PhD;  Nicola P Klein 7, MD, PhD;  Hannah Chung 3, MPH;  Kimberley A Simmonds 8, PhD;  Eduardo Azziz-Baumgartner 9, MD;  Becca S Feldman 4, ScD;  Avram Levy 10, PhD;  Deshayne B Fell 11, PhD;  Steven J Drews 12, PhD;  Shikha Garg 9, MD;  Paul Effler 13, MD;  Noam Barda 4, MD;  Stephanie A Irving 1, MHS;  Patricia Shifflett 2, MS, RN;  Michael L Jackson 14, PhD;  Mark G Thompson 9*, PhD

1 Kaiser Permanente Northwest, Center for Health Research , Portland, OR, US

2 Abt Associates, Inc , Cambridge, MA, US

3 ICES , Toronto, ON, CA

4 Chief Physician's Office, Clalit Health Services, Clalit Research Institute, Tel Aviv , IL

5 School of Public Health, Curtin University , Perth, Western Australia , AU

6 Cumming School of Medicine, University of Calgary , Calgary, AB, CA

7 Kaiser Permanente Vaccine Study Center , Oakland, CA, US

8 Alberta Health , Edmonton, AB, CA

9 Influenza Division, Centers for Disease Control and Prevention , Atlanta, GA, US

10 PathWest Laboratory Medicine Western Australia , Perth , AU

11 School of Epidemiology and Public Health, University of Ottawa , Ottawa, ON, CA

12 Department of Laboratory Medicine and Pathology , University of Alberta, Edmonton, AB, CA

13 Western Australia Department of Health , Perth , AU

14 Kaiser Permanente Washington Health Research Institute , Seattle, WA, US

*these authors contributed equally

Corresponding Author: