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A new study has raised questions about the long-term effectiveness of pertussis vaccine given to infants.
Posted in pediatrics Journal of June 10, he suggests that the effectiveness of the vaccine, commonly called DTaP, could reduce or not achieve the desired results as the child grows up.
The study found that the risk of pertussis infection was 13-fold higher in unvaccinated children and 1.9-fold higher in under-vaccinated children compared to fully immunized children.
In addition, the results also showed that in properly immunized children, the risk of contracting whooping cough increased as they moved away from their last dose of DTaP.
"This suggests that the effectiveness of the vaccine decreases over time," said Ousseny Zerbo, a researcher at Vaccine Study Center in northern California.
The study included 469,982 children aged 3 to 11 from northern California in the United States, where 738 cases of whooping cough were identified.
Of the 738 cases, 99 were not vaccinated, 36 were under-vaccinated, 515 were fully vaccinated and 88 were fully vaccinated plus one dose.
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Vaccine against whooping cough
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