Watergrasshill National School has become the latest school to confirm a case of Covid 19.
264 cases of Covid 19 have been linked to schools since they re-opened last month.
The HSE says 180 of them are among children and parents - with the rest close contacts.
Over 4,300 students and school staff have been tested to date, and there have been 11 outbreaks.
Last week RedFM News reported how St Gabriel's Special School in Bishopstown closed after 5 cases of Covid 19 were confirmed among staff and pupils.
The HSE says that In all cases a risk assessment is carried out and that the parents of any children deemed to be close contacts are alerted
Parents are reminded to keep their children at home if they display any symptoms of the virus
