About the Authors

Sandra S. Chaves

Roles Conceptualization, Funding acquisition, Methodology, Resources, Supervision, Validation, Writing – original draft, Writing – review & editing

Sandra.Chaves@sanofi.com

Affiliation Sanofi Vaccines, Lyon, France

Valérie Bosch Castells

Roles Conceptualization, Data curation, Formal analysis, Methodology, Project administration, Software, Validation, Writing – review & editing

Affiliation Sanofi Vaccines, Lyon, France

Ainara Mira-Iglesias

Roles Conceptualization, Data curation, Investigation, Project administration, Validation, Writing – review & editing

Affiliations Vaccine Research Department, Fisabio – Public Health, Valencia, Spain, CIBER-ESP, Instituto de Salud Carlos III, Madrid, Spain

Joan Puig-Barberà

Roles Investigation, Validation, Writing – review & editing

Affiliation Vaccine Research Department, Fisabio – Public Health, Valencia, Spain

F. Xavier López-Labrador

Roles Investigation, Validation, Writing – review & editing

Affiliations CIBER-ESP, Instituto de Salud Carlos III, Madrid, Spain, Virology Laboratory, Fisabio – Public Health, Valencia, Spain, Department of Microbiology and Ecology, Medical School, University of Valencia, Valencia, Spain

Miguel Tortajada-Girbés

Roles Investigation, Validation, Writing – review & editing

Affiliation Hospital Universitario Doctor Peset, Valencia, Spain

Mario Carballido-Fernández

Roles Validation, Writing – review & editing

Affiliations Hospital General Universitario de Castellón, Castellón, Spain, Medicine Department, Universidad CEU Cardenal Herrera, Castellón, Spain

Joan Mollar-Maseres

Roles Validation, Writing – review & editing

Affiliation Hospital Universitario y Politécnico La Fe, Valencia, Spain

Germán Schwarz-Chávarri

Roles Validation, Writing – review & editing

Affiliation Hospital General Universitario Dr. Balmis, Alicante, Spain

Javier Díez-Domingo

Roles Conceptualization, Funding acquisition, Investigation, Validation, Writing – review & editing

Affiliations Vaccine Research Department, Fisabio – Public Health, Valencia, Spain, CIBER-ESP, Instituto de Salud Carlos III, Madrid, Spain, Universidad Católica de Valencia San Vicente Mártir, Valencia, Spain

Alejandro Orrico-Sánchez

Roles Funding acquisition, Investigation, Resources, Validation, Writing – review & editing

Affiliations Vaccine Research Department, Fisabio – Public Health, Valencia, Spain, CIBER-ESP, Instituto de Salud Carlos III, Madrid, Spain, Universidad Católica de Valencia San Vicente Mártir, Valencia, Spain

Valencia Hospital Network for the Study of Influenza and other Respiratory Viruses (VAHNSI)

Membership of the VAHNSI is provided in the Acknowledgments.

Competing Interests

The following updated statement has been included in the cover letter “SSC and VBC are employees of Sanofi and may hold shares and/or stock options in the company. JD-D and AO-S have attended several congresses, whose registration, travel, and accommodation costs were covered by MSD, GSK, AZ, and Sanofi Pasteur (SP). AM-I has attended congresses, whose registration, travel, and accommodation costs were covered by MSD and SP. AO-S and JD-D, along with their institution, have received research grants from SP and GSK. AO-S and JD-D have acted as advisers for SP, with AO-S also advising Moderna. AM-I has received fees for conferences/experts’ meetings from SP and for educational events from MSD. FXL-L received grants from the Foundation for Influenza Epidemiology (France), payments to his institution from SP and CIBER-ESP (Instituto de Salud Carlos III, Spain), and individual payments for advisory boards from SP. FXL-L also holds a leadership role in the European Society of Clinical Virology as an Executive Member. This does not alter our adherence to PLOS ONE policies on sharing data and materials.