[Vaccination of children against influenza]

In 19 children of 1-7 years of age hemagglutination inhibiting antibodies were measured before and after vaccination against influenza. Before vaccination the serum titers have been markedly lower than in adults. A single vaccination with Alorbat, a vaccine of representative strains of influenza virus inactivated and adsorbed to aluminumoxide, was followed by the same rise of titer as in adults. Therefore with this vaccine a single vaccination is effective in children, and a booster 4 weeks later, as recommended otherwise, is not necessary.