Do you really have the flu?
The symptoms of influenza, more commonly known as the flu, usually develop over the course of a few hours.
The most common symptoms of the flu include a high temperature, sore muscles, dry cough, headache and sore throat.
The flu is often mistaken for the common cold, which tends to progress more gradually and includes a runny nose with a normal temperature.
Anyone who gets flu should stay at home, rest, drink plenty of fluids and use over-the-counter remedies like paracetamol to ease symptoms, said the HSE.
Anyone in one of the high-risk categories, such as the elderly and those with medical conditions, should contact their GP if they develop the flu, for whom GPs may wish to prescribe antivirals.