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Measles importations by international travelers, GeoSentinel 2019-2025

Ralph Huits1, Dora Buonfrate1, Kevin O'Laughlin2

  • 1Department of Infectious, Tropical Diseases and Microbiology, IRCCS Sacro Cuore Don Calabria Hospital, Negrar di Valpolicella, Verona, Italy.

Travel Medicine and Infectious Disease
|July 30, 2025
PubMed
Abstract

Insights

Measles outbreaks are a global concern. International travelers can spread measles, highlighting the need for vaccination before travel to prevent illness and protect public health.

Area of Science:

  • Global Health
  • Infectious Diseases
  • Epidemiology

Background:

  • Measles resurgence poses a significant threat to global measles elimination efforts.
  • International travel is a key factor in measles importation and subsequent outbreaks.

Purpose of the Study:

  • To analyze measles cases among international travelers and migrants.
  • To assess the epidemiology and impact of measles importations by travelers.

Main Methods:

  • Review of measles cases reported to the GeoSentinel network.
  • Data collection from international travelers and migrants from May 2019 to June 2025.

Main Results:

  • 53 measles cases were imported into 15 countries by international travelers.
  • The majority of cases (74%) were in adults aged 21 years and older.
  • Hospitalization occurred in 61% of cases, with 79% having no or unknown vaccination history.

Conclusions:

  • A stable trend of measles importations by travelers was observed despite rising global cases.
  • Measles caused significant illness (morbidity) in travelers.
  • Pretravel consultations are crucial for promoting vaccination coverage against measles and other vaccine-preventable diseases, as vaccination is highly effective (>97%).
Keywords:
GeoSentinelMeaslesMigrantsOutbreakTravelersVaccination

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