A health alert was issued in the small port town of Ermioni in the Peloponnese, Greece, after more than 30 middle school students developed sudden gastroenteritis symptoms, prompting swift action from local authorities. The rapid clustering of cases within a few hours raised serious concern among families and municipal leaders, leading to an immediate operational pause at the school.
Administrators ordered a precautionary closure on Thursday, December 11, 2025, to halt potential transmission and prevent further spread. Officials noted that if new cases appear by Friday, the shutdown will continue to allow thorough disinfection and give health teams additional time to assess the situation.
Local authorities offer reassurance as monitoring intensifies
Ermioni’s mayor, Giannis Georgopoulos, emphasized in comments to public broadcaster (ERT) that all affected students remain in stable condition. Despite the large number of cases, none appear to require escalated clinical care.
Preliminary assessments from public health staff suggest a viral gastroenteritis event, consistent with the rapid onset and spread among classmates. Authorities also ruled out any connection to a recent school trip, explaining that several of the students who fell ill had already exhibited symptoms beforehand and did not participate.
National Health Agency launched investigation after the gastroenteritis surge in Ermioni, Greece
The Health Center of Kranidi alerted the National Public Health Organization (EODY). EODY will now run tests, inspect the school, and speak with families to find the source of the outbreak.
Health officials across Greece urge parents to watch their children for dehydration or worsening symptoms. They also stress frequent handwashing and strong hygiene habits until the risk drops.
Recent gastroenteritis outbreaks in Greece
Greece has experienced several localized gastroenteritis surges in recent years, notably in early 2024 on islands such as Corfu and Naxos, where seasonal viruses circulated quickly through schools and tourist areas. Similar patterns were recorded in late 2023 in northern regions including Thessaloniki, where health authorities linked outbreaks to highly transmissible viral strains common in winter months.
Across Europe, comparable incidents were documented throughout 2024 and 2025, with clusters appearing in Spain, Italy, and southern France during the spring and autumn school terms. These outbreaks typically followed the same trajectory: rapid onset, widespread symptoms among children, and successful containment after targeted closures and sanitation campaigns.