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A comparative immunogenicity-reactogenicity dose-response study of influenza vaccine
S Guarnaccia1, S M Peters, F Habib
1Department of Pediatrics, Georgetown University School of Medicine, Washington, DC.
Annals of Allergy
|September 1, 1990
Summary
Lower doses of influenza vaccine reduce adverse reactions but may also decrease protective immunity. Diluting influenza vaccine is not recommended due to potential loss of efficacy.
Area of Science:
- Immunology
- Vaccinology
Background:
- Influenza vaccination is crucial for public health.
- Egg-sensitive allergic individuals may experience adverse reactions to influenza vaccines.
- Dilution of influenza vaccine is a common practice to mitigate reactions in allergic patients.
Purpose of the Study:
- To evaluate the immunogenic and reactogenic responses to different dosages of influenza vaccine.
- To assess the safety and efficacy of diluted influenza vaccine formulations.
Main Methods:
- 29 healthy nonallergic adults received influenza vaccine at 0.5 mL, 0.1 mL, or 0.05 mL.
- Adverse reactions were monitored for 7 days post-immunization.
- Serum hemagglutination-inhibition (HAI) antibody responses were measured over 28 days.
Main Results:
- Reduced incidence of adverse reactions observed with 0.1 mL and 0.05 mL vaccine doses compared to 0.5 mL.
- HAI antibody increases were comparable across dosages but lower in magnitude with reduced doses.
- Antibody response magnitude correlated directly with vaccine dosage.
Conclusions:
- While vaccine dilution decreases adverse reactions, it may also compromise protective immunity.
- Diluting influenza vaccine is not advisable due to the risk of diminished efficacy.
- Further research needed to optimize influenza vaccine strategies for allergic populations.