Dr Colbourn also outlines the defining signs of flu.
She said: “The flu tends to cause more whole-body symptoms rather than upper airway symptoms, like fever, fatigue, aches and pains, and headaches. However, you can experience some dry cough and a sore throat.”
Each year, people at risk of complications are offered a flu vaccine on the NHS.
And this year even more people will be eligible for a free vaccination.