Why did St Martin's School close?

St Martin's School closed temporarily due to a significant outbreak of a flu-like illness affecting over 250 pupils and staff.

What are the symptoms of the illness at St Martin's School?

Symptoms include vomiting, diarrhoea, high temperatures, coughs, headaches, fatigue, and general flu-like effects.

How long will St Martin's School be closed?

The school has closed for a short 'firebreak' period to allow for a thorough deep clean, with online learning in place.

Home / Health / Hundreds Sick: Caerphilly School Closes

Hundreds Sick: Caerphilly School Closes

7 Dec, 2025

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Summary

Over 250 pupils and staff fell ill with a flu-like illness.
St Martin's School in Caerphilly closed for deep cleaning.
Symptoms included vomiting, diarrhoea, and high temperatures.

A secondary school in Caerphilly has temporarily ceased operations following a widespread outbreak of a flu-like illness. St Martin's School reported that more than 250 pupils and staff members have been affected by the mystery bug, prompting an immediate closure.

The head teacher confirmed a significant outbreak, leading to the school's temporary shutdown for a thorough deep clean. During this "firebreak" period, online learning will be provided to students. A total of 242 pupils and 12 staff members were absent due to the illness.

Reported symptoms ranged from vomiting and diarrhoea to high temperatures, coughs, headaches, and general fatigue. The average recovery time for those affected appears to be approximately seven days. The school aims to resume normal operations after the cleaning process is complete.

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