1. National Influenza Centre, Centre Pasteur of Cameroon, Yaoundé, Cameroon, PO Box 1274Yaoundé Cameroon
2. Centre Pasteur of Cameroon, Annex of Garoua, PO Box 921Garoua Cameroon
3. Faculty of ScienceUniversity of Yaoundé 1P.O Box 812 Yaoundé Cameroon