Acknowledgements
We would like to acknowledge the personnel in Meilahti Vaccine Research Center (MeVac), Travel Clinic of Aava Medical Centre, Finnish-African Cultural Center Villa Karo, Villa Karo Research Center (VKRC), Medfiles Ltd, Synlab Ltd, Truly Agency Ltd, travel agency Aventura and Scandinavian Biopharma for all their valuable work in study conduct and the personnel at the University of Gothenburg for skilful technical assistance in carrying out immunological analyses, and PATH for their funding and support to the trial. Heli Agbodjakin, the late Juha Vakkuri, and, at Villa Karo in Benin, Kwassi Djidula Akpladokou are acknowledged for enabling study conduct in Benin and Mark Gimbutas for statistical analyses of the Clinical Study Report (CSR). Last but not least, we express our gratitude to our volunteers for their precious efforts.