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. 1983 Feb;90(1):107–115. doi: 10.1017/s0022172400063907

A graded-dose study of inactivated, surface antigen influenza B vaccine in volunteers: reactogenicity, antibody response and protection to challenge virus infection.

A Goodeve, C W Potter, A Clark, R Jennings, G C Schild, R Yetts
PMCID: PMC2134195  PMID: 6822725

Abstract

One hundred and nineteen volunteers were divided into five groups, and each volunteer inoculated subcutaneously with an aqueous subunit B/Hong Kong/73 vaccine containing 40, 20, 10, or 5 micrograms of HA or saline alone in a 0.5 ml volume. The incidence of reactions was recorded 24 h after inoculation. One month following immunization the serum HI antibody to B/Hong Kong/73 virus was measured; each volunteer was inoculated intranasally with live, attenuated influenza B (RB77) virus; and the incidence of infection by the challenge virus was determined by HI antibody response. The results showed that the incidence of reactions to all doses of vaccine were relatively low, the severity mild, and the duration short. However, the incidence of reactions was highest for those given 40 micrograms HA and least for those given 5 micrograms HA. The serum HI antibody responses to vaccine showed a dose-response relationship. For volunteers given 40 micrograms HA, 22 (96%) showed a fourfold rise in antibody titre and all volunteers had antibody titres of greater than 40 following immunization: for volunteers given 5 micrograms HA the g.m.t. increased from 16.6 to 86.1; and for those given 10 and 20 micrograms HA the response was intermediate. Following challenge, the lowest incidence of infection was seen in volunteers given the highest dose of vaccine. However, all doses of vaccine induced some protection against challenge virus infection, and the incidence of infection was directly related to the serum antibody titre at the time of challenge. The 50% protection titre of serum HI antibody was estimated as 15 to 20.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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