N. P. K. reports grants from GlaxoSmithKline, Sanofi Pasteur, Pfizer, Protein Science, Merck & Co, MedImmune, Novartis (now GSK), and Dynavax outside the submitted work. S. J. D. reports being a content advisor to Johnson & Johnson (Jannsen Pharmaceuticals) on respiratory virus testing. A. N. reports grants from Pfizer, MedImmune/Astra Zeneca, and Merck outside the submitted work.

Members of the PREVENT workgroup in addition to the named authors include the following: Centers for Disease Control and Prevention (Eduardo Azziz-Baumgartner), Abt Associates (Pat Shifflet, Rebecca V. Fink), Institute for Clinical Evaluative Sciences (ICES) (Deshayne Fell), Clalit Research Institute (Dan Riesel), Central Virology Laboratory, Israel Ministry of Health (Michal Mandelboim), Israel Center for Disease Control, Israel Ministry of Health (Aharona Glatman-Freedman), Department of Health Western Australia (Paul Effler), and Kaiser Permanente Northern California (Ned Lewis).

In Western Australia, the authors thank the Linkage and Client Services Teams at the Data Linkage Branch (Department of Health Western Australia) as well as the Data Custodians for the Midwives Notification System, the Hospital Morbidity Data Collection, the WA Antenatal Vaccination Database, PathWest Laboratory Medicine Data Collection, and the Western Australia Notifiable Infectious Disease Database.

In Ontario, the authors thank the laboratory data providers from PHO (Jonathan Gubbay), Children’s Hospital of Eastern Ontario (Timothy Karnauchow and Dayre McNally), North York General Hospital (Kevin Katz), St. Joseph’s Healthcare Hamilton (Marek Smieja), Sinai Health System and University Health Network (Allison McGeer), Sunnybrook Health Sciences Centre (Andrew Simor), and William Osler Health System (David Richardson).

In Israel, the authors thank Noam Barda, Maya Leventar-Roberts, and Ilan Gofer.

In Alberta, the authors thank Kimberley Simmonds, Stephanie M Booth, Margaret Russell, and Lawrence W. Svenson.

At Kaiser Permanente Northwest, the authors thank Bradley Crane and Matthew Slaughter. At Kaiser Permanente Northern California, the authors thank Kristin Goddard, Edwin Lewis, and Sharareh Modaressi. At Kaiser Permanente Washington, the authors thank Lisa Ross and Lawrence Madziwa.