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  • Title: Efficacy of live, attenuated, human rotavirus vaccine 89-12 in infants: a randomised placebo-controlled trial.
    Author: Bernstein DI, Sack DA, Rothstein E, Reisinger K, Smith VE, O'Sullivan D, Spriggs DR, Ward RL.
    Journal: Lancet; 1999 Jul 24; 354(9175):287-90. PubMed ID: 10440305.
    Abstract:
    BACKGROUND: Rotavirus is the most common cause of severe, dehydrating diarrhoea in infants worldwide. We assessed the safety, immunogenicity, and efficacy of a live, oral human rotavirus vaccine, 89-12, in US children in a randomised, placebo-controlled, double-blind multicentre trial. METHODS: 215 healthy infants were enrolled, of whom 213 were given two doses of 89-12 (containing 1x10(5) plaque-forming units) or placebo, and 213 were followed up through one rotavirus season. The frequency of side-effects was compared for 7 days after each dose of vaccine. Immune responses to rotavirus were assessed by serum and stool IgA, and by serum 89-12 neutralising titres. The primary outcome variable (protection from rotavirus disease) was evaluated by comparing the frequencies of rotavirus gastroenteritis in an intention-to-treat analysis. FINDINGS: Adverse reactions were mild. Low-grade fever (> or = 38.1 degrees C) after the first dose was the only side-effect significantly more common in the vaccine group than in the placebo group (21 [19%] vs 5 [5%], p=0.001). An immune response to vaccine was detected in 94.4% of vaccinees. Rotavirus disease occurred in 18 of 107 placebo recipients and two of 108 vaccine recipients (vaccine efficacy 89.0% [95% CI 65.4-94.5]). Ten infants in the placebo group but none in the vaccine group were presented for medical care. INTERPRETATION: The 89-12 rotavirus vaccine was safe and immunogenic and provided a high degree of protection against rotavirus disease. Further investigations of this vaccine are needed to confirm these findings in other settings.
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