Funding for this research was provided by:
National Institute of Allergy and Infectious Diseases (5U19AI089680)
National Institutes of Health (5T32AI007417)
Received: 11 June 2019
Accepted: 21 November 2019
First Online: 4 December 2019
Ethics approval and consent to participate
: This research underwent ethical review and was approved by the Institutional Review Board at the Johns Hopkins Bloomberg School of Public Health (Baltimore, MD USA), the Ethics Review Committee of the Tropical Diseases Research Centre (Ndola, Zambia), and Le Comité d’éthique de l’Université Protestante au Congo (Kinshasa, the Democratic Republic of the Congo). All adult participants gave informed consent. All child participants gave assent and had parental consent for participation.
: Not applicable.
: The authors declare that they have no competing interests.