Makerere University School of Public Health, Institut Pasteur du Cambodge, Université Paris Cité, affiliation not provided to SSRN, affiliation not provided to SSRN, Institut Pasteur du Cambodge, Institut Pasteur du Cambodge, Institut Pasteur du Cambodge, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Université Paris Cité, World Health Organization (WHO), University of Basel - Swiss Tropical and Public Health Institute, University of Basel - Swiss Tropical and Public Health Institute, affiliation not provided to SSRN, Université Paris Cité, University of Basel - Swiss Tropical and Public Health Institute and Institut Pasteur du Cambodge