About the Authors

John Njuma Libwea

Roles Conceptualization, Formal analysis, Funding acquisition, Methodology, Resources, Validation, Visualization, Writing – original draft, Writing – review & editing

libwea_j@yahoo.com

Affiliations National Institute for Health and Welfare (THL), Helsinki, Finland, Health Sciences Unit, Faculty of Social Sciences, Tampere University, Tampere, Finland, Expanded Programme on Immunization, Cameroon

Mark A. Fletcher

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

Affiliation Emerging Markets Medical Affairs, Vaccines, Pfizer, Inc, Paris, France

Paul Koki Ndombo

Roles Conceptualization, Investigation, Project administration, Resources, Supervision, Validation, Writing – review & editing

Affiliations Expanded Programme on Immunization, Cameroon, Mother & Child Hospital (MCH), Chantal Biya Foundation, Yaoundé, Cameroon

Angeline Boula

Roles Data curation, Investigation, Supervision, Validation, Writing – review & editing

Affiliation Mother & Child Hospital (MCH), Chantal Biya Foundation, Yaoundé, Cameroon

Nadesh Taku Ashukem

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

Affiliations Mother & Child Hospital (MCH), Chantal Biya Foundation, Yaoundé, Cameroon, Ministry of Public Health, Yaoundé, Cameroon

Madeleine Ngo Baleba

Roles Data curation, Investigation, Validation, Writing – review & editing

Affiliation Mother & Child Hospital (MCH), Chantal Biya Foundation, Yaoundé, Cameroon

Rachel Sandrine Kingue Bebey

Roles Data curation, Investigation, Methodology, Validation, Writing – review & editing

Affiliation Mother & Child Hospital (MCH), Chantal Biya Foundation, Yaoundé, Cameroon

Eric Gaston Nkolo Mviena

Roles Data curation, Investigation, Methodology, Validation, Writing – review & editing

Affiliation Mother & Child Hospital (MCH), Chantal Biya Foundation, Yaoundé, Cameroon

Jean Tageube

Roles Data curation, Investigation, Methodology, Validation, Writing – review & editing

Affiliation Mother & Child Hospital (MCH), Chantal Biya Foundation, Yaoundé, Cameroon

Marie Kobela Mbollo

Roles Data curation, Investigation, Supervision, Validation, Writing – review & editing

Affiliations Expanded Programme on Immunization, Cameroon, Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, Yaoundé, Cameroon

Sinata Koulla-Shiro

Roles Data curation, Methodology, Project administration, Supervision, Validation, Writing – review & editing

Affiliations Ministry of Public Health, Yaoundé, Cameroon, Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, Yaoundé, Cameroon

Shabir Madhi

Roles Project administration, Supervision, Validation, Writing – review & editing

Affiliation South African Medical Research Council Vaccines and Infectious Diseases Analytical Research Unit, Faculty of HealthSciences, University of the Witwatersrand, Johannesburg, South Africa

Berthe-Marie Njanpop-Lafourcade

Roles Conceptualization, Data curation, Methodology, Supervision, Validation, Writing – review & editing

Affiliation Agence de Médicine Préventive (AMP), Paris, France

Ali Mohammad

Roles Formal analysis, Methodology, Validation, Writing – review & editing

Affiliation Pfizer Vaccines Medical Development & Medical/Scientific Affairs, New York, New York, United States of America

Elizabeth Begier

Roles Funding acquisition, Methodology, Validation, Visualization, Writing – review & editing

Affiliation Pfizer Vaccines Medical Development & Medical/Scientific Affairs, New York, New York, United States of America

Joanna Southern

Roles Funding acquisition, Methodology, Validation, Visualization, Writing – original draft, Writing – review & editing

Affiliation Pfizer Vaccines Medical Development & Medical/Scientific Affairs, New York, New York, United States of America

Rohini Beavon

Roles Conceptualization, Methodology, Resources, Validation, Writing – review & editing

Affiliation Pfizer Vaccines Medical Development & Medical/Scientific Affairs, New York, New York, United States of America

Bradford Gessner

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

Affiliation Pfizer Vaccines Medical Development & Medical/Scientific Affairs, New York, New York, United States of America

Competing Interests

Some of the co-authors (MA, BB, JS, MAF, RB and BG) are employed by Pfizer, Inc and may own stock or stock options. The authors adhere to PLOS ONE policies on sharing data and materials.