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Travellers returning with measles from Thailand to Finland, April 2012: infection control measures

A Kantele1, K Valtonen, I Davidkin

  • 1Department of Medicine, Division of Infectious Diseases, Helsinki University Central Hospital, Helsinki, Finland. anu.kantele@hus.fi

Euro Surveillance : Bulletin Europeen Sur Les Maladies Transmissibles = European Communicable Disease Bulletin
|June 13, 2012
PubMed

Insights

Imported measles cases pose a risk to unvaccinated populations. Travellers returning from Thailand in 2012 spread measles, resulting in secondary infections even in vaccinated individuals.

Area of Science:

  • Epidemiology
  • Infectious Disease Transmission
  • Public Health

Background:

  • Countries aim for measles elimination, but imported cases remain a threat.
  • International travel facilitates the global spread of infectious diseases.
  • Maintaining high vaccination coverage is crucial for herd immunity.

Observation:

  • Three contagious travellers returning from Phuket, Thailand, were diagnosed with measles in April 2012.
  • These travellers exposed individuals during their return flights.
  • Secondary measles transmission occurred in the exposed population.

Findings:

  • Two secondary measles cases were identified among those exposed.
  • One secondary case was a child with a single vaccine dose.
  • Another secondary case was a fully vaccinated child, indicating potential vaccine failure or waning immunity.

Implications:

  • Imported measles cases can lead to outbreaks even in regions with elimination goals.
  • The findings highlight the importance of robust surveillance and rapid response to imported cases.
  • Further research into vaccine effectiveness and duration of immunity may be warranted.

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