Delayed 2009 Pandemic Influenza A Virus Subtype H1N1 Circulation in West Africa, May 2009–April 2010

• Naval Medical Research Unit EURAFCENT (EG)

• Ghana Health Service (GH)

• Donka Hospital (GN)

• Centre Pour le Développement des Vaccins-Mali (ML)

as printed: Samba Sow

• Institut National de Recherches en Santé Publique (MR)

• Centre de Recherche Médicale et Sanitaire (NE)

as printed: Jean-Marc Collard

• Nigeria Centre for Disease Control (NG)

• Institut Pasteur de Dakar (SN)

as printed: Kathryn Lafond

• Institut National d’Hygiène Publique (CI)

• Naval Medical Research Unit EURAFCENT (EG)

• Naval Medical Research Unit EURAFCENT (EG)

• Noguchi Memorial Institute for Medical Research (GH)

• Centre Pour le Développement des Vaccins-Mali (ML)

• Institut National de Recherches en Santé Publique (MR)

• Centre de Recherche Médicale et Sanitaire (NE)

as printed: Jean-François Jusot

• Nigeria Centre for Disease Control (NG)

• Institut Pasteur de Dakar (SN)

as printed: Fatoumata Diène Sarr

• Naval Medical Research Unit EURAFCENT (EG)

• Federal Ministry of Health (NG)

• Naval Medical Research Unit EURAFCENT (EG)

as printed: Marc-Alain Widdowson