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  • Title: Oral immunisation with killed Haemophilus influenzae for protection against acute bronchitis in chronic obstructive lung disease.
    Author: Clancy R, Cripps A, Murree-Allen K, Yeung S, Engel M.
    Journal: Lancet; ; 2(8469-70):1395-7. PubMed ID: 2867396.
    Abstract:
    Fifty patients with chronic obstructive lung disease were randomly allocated to three groups, to assess whether an oral vaccine containing non-typable Haemophilus influenzae protected against acute bronchitis. The double-blind prospective study over a three-month winter period included two placebo groups and one test group. Oral immunisation with H influenzae induced a tenfold reduction in the incidence of infection (p less than 0.001). During the subsequent winter, without further immunisation, protection by the vaccine was no longer statistically significant. There was no clear correlation between clinical protection and either carriage of H influenzae or the level of antibody to H influenzae antigen in saliva.
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