Reduced-dose intradermal vaccination against hepatitis A with an aluminum-free vaccine is immunogenic and can lower costs.

Pancharoen, Chitsanu; Mekmullica, Jutarat; Thisyakorn, Usa; Kasempimolporn, Songsri; Wilde, Henry; Herzog, Christian · Clin Infect Dis · 2005

prospective_cohort · Level II

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Abstract

A reduced dose (0.1 mL) of intradermal hepatitis A virus (HAV) vaccine could facilitate the control of hepatitis A in countries of endemicity. All study subjects receiving an aluminum-free HAV vaccine intradermally were seroprotected 28 days after vaccination (anti-HAV titer, > or =10 mIU/mL). Seroprotection rates decreased to 80.8% at 12 months but returned to 100%, with titers increasing 28-fold, after receipt of a booster vaccination.

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