Analysis of the epidemiological situation of pertussis in the region of Granada (Spain) in the 2023-2024 season

Introduction: the incidence of pertussis has shown a sudden increase in 2023 and 2024, exceeding the figures for the 2015 outbreak. The main objective of this study was to analyse the epidemiological situation of pertussis and the vaccination coverage against it in children in the province of Granada (Spain) in 2023 and 2024. Material and methods: we conducted a descriptive retrospective study of the epidemiological situation of pertussis in the province of Granada based on the notifications made to the Andalusian Epidemiological Surveillance System (SVEA) in 2023 and in the first 15 weeks of 2024. Results: a total of 809 cases of pertussis were reported in the province of Granada during the study period. The age group with the highest number of cases was children aged 11-15 years, with 253 reported cases, followed by children aged 1-5 years. The vaccination coverage rate in children aged 11 to 15 years was 91%. Conclusions: most cases occurred in school-aged children with fully vaccinated status, and no deaths were reported. The outcome in infants aged less than 1 year who required hospitalization (29.6%) was favourable in every case.