1Infectious Disease Hospital, University Hospital, Octav Botez Street no. 2, Iasi, Romania2Association Pour l'Aide à la Médecine Préventive, Institut Pasteur, 28 rue du Docteur Roux, 75015 Paris, France311100 Stony Brook Drive, Anchorage, AK, 99516, USA4Clinical Hospital of Infectious Diseases, Stefan-cel-mare Street no. 133, Constanta, Romania5National Reference Center for Haemophilus Infection, State Health Institute, NRC HI-V, Spanyola 27, 01171 Zilina, Slovakia6Aventis Pasteur, Lemboeckgasse 49/2/TopE5-2, 1230, Vienna, Austria