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Medline ® Abstract for Reference 34

of 'Hepatitis A virus infection: Prevention'

Comparative immunogenicity and tolerance of Vaqta and Havrix.
Braconier JH, Wennerholm S, Norrby SR
Vaccine. 1999;17(17):2181.
In an open-label, randomised trial, 520 adults of both sexes aged 18-30 years were allocated to receive one of two inactivated hepatitis A vaccines; Vaqta or Havrix, at 0 and 24 weeks. Doses used were 50 or 100 antigen units (U) of Vaqta and 1440 enzyme linked immunosorbent assay U of Havrix given as 1 ml intramuscular injections. For each trial group safety data were available for all subjects and full serological data for more than 80% of randomised volunteers. Local side effects which were mild in most cases were significantly (p<0.0001) more common with Havrix than with Vaqta, irrespective of dose given. Systemic tolerance was similar for the 3 regimens. From 4 weeks after the first dose,>or =94% of the subjects had seroconverted. The mean antibody titres 4 weeks after the second vaccine dose were 2978, 4346 and 1589 mIU/ml in subjects who were randomised to Vaqta 50 U/dose, Vaqta 100 U/dose and Havrix 1440 U/dose, respectively. The 2 vaccines had similar immunogenicity but local tolerance was better with Vaqta.
Department of Infectious Diseases, Lund University Hospital, University of Lund, Sweden.