Google has told the majority of its 8,000 workers to stay at home for a second day.
he company is still waiting on results for the worker who has reported flu-like symptoms.
The move affects the web giant’s massive Barrow Street and Dublin 4 offices, but not its data centres, Eastpoint or Sandyford facilities.
It comes after Twitter told over 200 workers in its Dublin offices to work at home if they could.
Facebook, which has almost 4,000 Irish workers, has cancelled all “social” visits to its Dublin office, but remains open for business otherwise.
Microsoft Ireland, which has over 2,000 staff, says that it is business as usual but has emphasised its flexible working conditions for workers who want to work from home.