Public health officials in France are reporting a measles outbreak in Val Thorens located in the town of Belleville, Savoie.
To date, five measles cases have been confirmed and another 20 suspect cases are under investigation.
The cases are primarily in young adults working at the winter sports resort.
In addition, the Scottish and Belgian health authorities reported 2 suspected cases of measles among residents upon return to their country who were at Méribel and Val Thorens, respectively.
Health authorities say the risk of more cases is favorable as the ski resort at Val Thorens is very busy, especially since the beginning of the French school holidays on February 9 the presence of many foreign nationals, especially Dutch, British and Scandinavian.
In the past year, Public Health France reported 2,652 cases from Feb. 2018 to Feb. 2019 to date. One quarter of the patients required hospitalization and three deaths were recorded.
Officials note that 89% of measles cases occurred in unimmunized or poorly vaccinated patients.