Adapting response to a measles outbreak in a context of high vaccination and breakthrough cases: an example from Vaud, Switzerland, January to March 2024

Author:

Cassini Alessandro123ORCID,Cobuccio Ludovico123,Glampedakis Emmanouil3,Cherpillod Pascal456,Crisinel Pierre Alex7,Pérez-Rodríguez Francisco-Javier456,Attinger Monica3,Bachelin Dominique3,Tessemo Marie Nahimana3,Maeusezahl Mirjam8,Gardiol Céline8,Boubaker Karim3

Affiliation:

1. These authors contributed equally to this work and share first authorship.

2. Infectious Diseases Service, Lausanne University Hospital, Lausanne, Switzerland

3. Cantonal Doctor Office, Public Health Department, Canton of Vaud, Lausanne, Switzerland

4. Laboratory of Virology, Laboratory Medicine Division, Geneva University Hospitals, Geneva, Switzerland

5. National Measles and Rubella Reference Laboratory, Geneva University Hospitals, Geneva, Switzerland

6. Geneva Center for Emerging Viral Diseases, Geneva University Hospitals, Geneva, Switzerland

7. Unit of paediatric infectious diseases and vaccinology, Service of Paediatrics, Women-Mother-Child Department, Lausanne University Hospital, Lausanne, Switzerland

8. Communicable Disease Division, Federal Office of Public Health, Bern, Switzerland

Abstract

A measles outbreak with 51 cases occurred in the canton of Vaud, Switzerland, between January and March 2024. The outbreak was triggered by an imported case, and 37 (72.5%) subsequent cases were previously vaccinated individuals. Epidemiological investigations showed that vaccinated measles cases were symptomatic and infectious. In a highly vaccinated population, it is important to raise awareness among healthcare professionals to suspect and test for measles virus when an outbreak is declared, irrespective of the vaccination status of the patients.

Publisher

European Centre for Disease Control and Prevention (ECDC)

Reference25 articles.

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4. World Health Organization Regional Office for Europe (WHO/Europe). Measles and rubella elimination country profile: Switzerland. Copenhagen: WHO/Europe; 2020. Available from: https://iris.who.int/handle/10665/337743

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