Combined hexavalent diphtheria-tetanus-acellular pertussis-hepatitis B-inactivated poliovirus-Haemophilus influenzae type B vaccine; Infanrix™ hexa: twelve years of experience in Italy

Abstract

Infant vaccination using 2-dose priming at 3 and 5 mo of age with a booster at 11-12 mo of age was pioneered in Italy. The 3-5-11 schedule is now used in a growing number of European countries. Infanrix™ hexa (DTPa-HBV-IPV/Hib, GlaxoSmithKline Vaccines) was first licensed for use in 2000 and has been the only pediatric hexavalent vaccine available since 2005. We reviewed available clinical trial data describing the immunogenicity of DTPa-HBV-IPV/Hib when administered at 3, 5, and 11 mo of age, and conducted an analysis of safety using global and Italian post-marketing surveillance data. In Italy, DTPa-HBV-IPV/Hib has a demonstrated safety record extending over a decade of use, it has been associated with record levels of vaccine coverage, and with sustained disease control in vaccinated cohorts. Hexavalent vaccines will continue to contribute to high vaccine coverage in Italy and across Europe.

Keywords: Italy; booster vaccination; combination vaccines; hexavalent vaccine; immunogenicity; primary vaccination; safety.

Figure 1.Haemophilus influenzae invasive disease in children <5 y of age: Italy 1994–2012. Adapted from publically available data reports of Istituto Superiore di Sanità-Roma, accessed at http://www.simi.iss.it/files/Report_MBI.pdf and http://www.simi.iss.it/files/Report_meningiti_1994-2006.pdf April 2013). *partial data.