Pertussis epidemic in Denmark, August 2023 to February 2024

Author:

Nordholm Anne Christine1,Emborg Hanne-Dorthe1,Nørgaard Sarah Kristine1,Nygaard Ulrikka23,Ronayne Aoife4,Nielsen Lise Birk1,Søborg Bolette1,Andersen Peter H1,Dalby Tine1

Affiliation:

1. Department of Infectious Disease Epidemiology and Prevention, Statens Serum Institut, Copenhagen, Denmark

2. Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark

3. Department of Paediatrics and Adolescents, Rigshospitalet Copenhagen University Hospital, Copenhagen, Denmark

4. Department of Bacteria, Parasites and Fungi, Statens Serum Institut, Copenhagen, Denmark

Abstract

We report a record high pertussis epidemic in Denmark since August 2023. Highest incidence was in adolescents, while peak incidence in infants was lower vs previous epidemics in 2019 and 2016. Among infants aged 0–2 months, over half (29/48) were hospitalised and one infant died, underlining the disease severity in the youngest. To protect infants, pertussis vaccination in pregnant women was introduced in January 2024 in the national vaccination programme. Improved vaccination surveillance in pregnant women is being implemented.

Publisher

European Centre for Disease Control and Prevention (ECDC)

Reference19 articles.

1. Pertussis (Whooping Cough).;Decker;J Infect Dis,2021

2. Indenrigs- og Sundhedsministeriet. Sundhedsstyrelsens bekendtgørelse om anmeldelse af smitsomme sygdomme: BEK nr. 1260 af 27/10 2023. [Executive Order on notification of communicable diseases. The Danish Health Authority’s executive order no. 1260 of 27/1]. Copenhagen; Danish Health Authority, 2023. Danish. Available from: https://www.sst.dk/-/media/Udgivelser/2023/Smitsomme-sygdomme/Vejledning-om-anmeldelse-af-smitsomme-sygdomme.ashx

3. Epidemiology of pertussis in Denmark, 1995 to 2013.;Dalby;Euro Surveill,2016

4. Mycoplasma pneumoniae epidemic in Denmark, October to December, 2023.;Nordholm;Euro Surveill,2024

5. Early and intense epidemic of respiratory syncytial virus (RSV) in Denmark, August to December 2022.;Munkstrup;Euro Surveill,2023

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