He has been working in the field of vaccines and vaccination for more than fifteen years, five of which he was in charge of the Sanofi Pasteur Regional office for French-Speaking Africa, and three years leading the activities of Sanofi Pasteur in South Africa. During the eight years that Dr. Zinsou spent in Africa, he worked actively to improve the vaccination coverage rate, thus contributing to better protection of African children against vaccine-preventable diseases. In 2013, he joined the Sanofi Pasteur Global Team dedicated to the dengue vaccine development. As a member of the Sanofi Pasteur Global Public Affairs and Advocacy Team, he has been instrumental in the publication of the WHO position paper which is providing some guidance on the use of the first dengue vaccine.