Comparison of adverse events following immunization with pandemic influenza A (H1N1)pdm09 vaccine with or without adjuvant among health professionals in Rio de Janeiro, Brazil
Mem. Inst. Oswaldo Cruz
;
107(7): 923-927, Nov. 2012. tab
Article
in English
| LILACS
| ID: lil-656050
ABSTRACT
A vaccination campaign against pandemic influenza A (H1N1)pdm09 was held in Brazil in March 2010, using two types of monovalent split virus vaccines an AS03-adjuvanted vaccine and a non-adjuvanted vaccine. We compared the reactogenicity of the vaccines in health professionals from a Clinical Research Institute in Rio de Janeiro, Brazil and there were no serious adverse events following immunization (AEFI) among the 494 subjects evaluated. The prevalence of any AEFI was higher in the AS03-adjuvanted vaccine at 2 h and 24 h post-vaccination [preva-lence ratio (PR) 2.05, confidence interval (CI) 95% 1.55-2.71, PR 3.42, CI 95% 2.62-4.48, respectively]; however, there was no difference between the vaccines in the assessments conducted at seven and 21 days post-vaccination. The group receiving the AS03 post-adjuvanted vaccine had a higher frequency of local reactions at 2 h (PR 3.01, CI 95% 2.12-4.29), 24 h (PR 4.57, CI 95% 3.29-6.37) and seven days (PR 6.05, CI 95% 2.98-12.28) post-vaccination. We concluded that the two types of vaccines caused no serious AEFI in the studied population and the adjuvanted vaccine was more reactogenic, particularly in the 24 h following vaccination. This behaviour must be confirmed and better characterised by longitudinal studies in the general population.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Influenza Vaccines
/
Adjuvants, Immunologic
/
Health Personnel
/
Influenza, Human
/
Influenza A Virus, H1N1 Subtype
/
Antibodies, Viral
Type of study:
Observational study
/
Risk factors
Limits:
Adult
/
Female
/
Humans
/
Male
Country/Region as subject:
South America
/
Brazil
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
2012
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Fiocruz/BR
/
Universidade do Estado do Rio de Janeiro/BR
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