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Safety and effectiveness of an acellular pertussis vaccine in subjects with Down's syndrome
S Li Volti1, T Mattina, L Mauro
1Pediatric Clinic, University of Catania, Italy.
Insights
This study found that an acellular pertussis vaccine was safe for infants with Down syndrome. While protective antibody levels were achieved, they were lower than in healthy infants.
Area of Science:
- Immunology
- Pediatrics
- Vaccinology
Background:
- Pertussis remains a significant public health concern.
- Individuals with Down syndrome may have unique immunological considerations.
- Assessing vaccine safety and efficacy in vulnerable populations is crucial.
Purpose of the Study:
- To evaluate the safety and immunogenicity of an acellular pertussis vaccine.
- To compare vaccine response in infants with Down syndrome versus healthy infants.
Main Methods:
- Acellular pertussis vaccine administered to 24 infants with Down syndrome and 10 healthy infants.
- Monitoring for general and local adverse reactions.
- Measuring IgG antibody levels against Bordetella pertussis.
Main Results:
- No adverse reactions were observed in either group.
- All infants with Down syndrome achieved protective antibody levels.
- Geometric mean titres of IgG antibodies were significantly lower in infants with Down syndrome compared to controls.
Conclusions:
- The acellular pertussis vaccine demonstrates a favorable safety profile in infants with Down syndrome.
- While immunogenic, the antibody response in this group is lower than in healthy infants.
- Further research may be warranted to optimize pertussis vaccination strategies for individuals with Down syndrome.
Abstract:
We evaluated the reactogenicity and immunogenicity of an acellular pertussis vaccine in 24 subjects affected by Down's syndrome and in 10 normal infants. Neither general nor local adverse reactions were observed in either group of subjects. The new acellular vaccine administration elicited protective levels of antibodies in all the subjects with Down's syndrome, although the geometric mean titres of IgG antibodies against Bordetella pertussis in these subjects were significantly lower than in normal controls.