1 West African Health Organization, Bobo-Dioulasso 01BP153, Burkina Faso; School of Public Health, Université Libre de Bruxelles, Brussels, Belgium; GFA Consulting Group, Bobo-Dioulasso, Burkina Faso. Electronic address: olivier.manigart@lshtm.ac.uk.
2 West African Health Organization, Bobo-Dioulasso 01BP153, Burkina Faso; General Direction of Public Health, Ouagadougou, Burkina Faso.
3 General Direction of Public Health, Ouagadougou, Burkina Faso.
4 West African Health Organization, Bobo-Dioulasso 01BP153, Burkina Faso; Institut Pasteur de Dakar, Dakar, Senegal.
5 West African Health Organization, Bobo-Dioulasso 01BP153, Burkina Faso; Regional Center for Surveillance and Diseases Control, Abuja, Nigeria.