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2025 theme: Vaccines

Abstract

An outbreak of measles virus genotype B3 is ongoing in Milan and surrounding areas since February 2025, with 27 cases identified in 32 laboratory-confirmed measles cases. Most cases were locally acquired and young adults. Phylogenetic analysis indicated the presence of a unique lineage closely related to strains circulating in Morocco. The lack of epidemiological links between several affected individuals suggests case numbers are being underestimated. The continuous transmission raises concerns about the potential re-establishment of endemic circulation in northern Italy.

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/content/10.2807/1560-7917.ES.2025.30.20.2500315
2025-05-22
2025-05-24
/content/10.2807/1560-7917.ES.2025.30.20.2500315
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From multiple measles genotype D8 introductions in 2024 to sustained B3 local transmission in and around Milan, northern Italy, January to April 2025
<p class="citation"> <span>Citation style for this article:</span> <span class="meta-value authors"> <a href="/search?value1=Clara+Fappani&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Fappani Clara</a>, <a href="/search?value1=Maria+Gori&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Gori Maria</a>, <a href="/search?value1=Silvia+Bianchi&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Bianchi Silvia</a>, <a href="/search?value1=Lucia+Tieghi&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Tieghi Lucia</a>, <a href="/search?value1=Daniela+Colzani&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Colzani Daniela</a>, <a href="/search?value1=Sabrina+Senatore&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Senatore Sabrina</a>, <a href="/search?value1=Marino+Faccini&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Faccini Marino</a>, <a href="/search?value1=Priscilla+Pasutto&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Pasutto Priscilla</a>, <a href="/search?value1=Luca+Imeri&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Imeri Luca</a>, <a href="/search?value1=Luigi+Vezzosi&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Vezzosi Luigi</a>, <a href="/search?value1=Gabriele+Del+Castillo&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Del Castillo Gabriele</a>, <a href="/search?value1=Simone+Villa&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Villa Simone</a>, <a href="/search?value1=Danilo+Cereda&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Cereda Danilo</a>, <a href="/search?value1=Silvia+Gioacchini&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Gioacchini Silvia</a>, <a href="/search?value1=Paola+Bucci&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Bucci Paola</a>, <a href="/search?value1=Raoul+Fioravanti&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Fioravanti Raoul</a>, <a href="/search?value1=Emilio+D%E2%80%99Ugo&option1=author&noRedirect=true" class="nonDisambigAuthorLink">D’Ugo Emilio</a>, <a href="/search?value1=Melissa+Baggieri&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Baggieri Melissa</a>, <a href="/search?value1=Fabio+Magurano&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Magurano Fabio</a>, <a href="/search?value1=Antonella+Amendola&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Amendola Antonella</a></span>. From multiple measles genotype D8 introductions in 2024 to sustained B3 local transmission in and around Milan, northern Italy, January to April 2025. <a href="/content/ecdc">Euro Surveill.</a> 2025;30(20):pii=2500315. <a href="https://doi.org/10.2807/1560-7917.ES.2025.30.20.2500315" title="doi link" target="_blank">https://doi.org/10.2807/1560-7917.ES.2025.30.20.2500315</a> <span class="ES_Article_citation"> <span class="generated">Received</span>: 09 May 2025;&nbsp;&nbsp; <span class="generated">Accepted</span>: 22 May 2025 </span> </p>
/content/10.2807/1560-7917.ES.2025.30.20.2500315
/content/10.2807/1560-7917.ES.2025.30.20.2500315
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