Authorities in Ermioni have closed the local middle school after more than 30 students developed symptoms of gastroenteritis, raising concerns among parents and local officials. The precautionary closure began on Thursday, December 11, 2025, to help contain the spread of the virus.

The mayor of Ermioni, Giannis Georgopoulos, confirmed that the students’ health remains stable despite the high number of cases. Officials believe the outbreak is caused by a viral infection, which explains its rapid transmission among the children.

The recent school trip is not believed to be linked to the outbreak, as some affected students showed symptoms before participating in the excursion.

The local health center in Kranidi has notified the Hellenic National Public Health Organization (EODY), which is set to begin investigations to determine the source of the outbreak and implement necessary control measures.

Authorities advise parents to monitor their children for symptoms, maintain strict hygiene practices, and seek medical attention if conditions worsen. The school may remain closed on Friday if new cases continue to emerge, allowing for thorough disinfection and monitoring.