As the symptoms of all three are closely linked and extremely common in winter, it can be tricky to tell the difference. Children get three times as many colds per year than adults, so Reid advises: “It’s important to remember that most will have a common seasonal virus, which can be treated by keeping hydrated, and with paracetamol.”

Is it a cold?

“At this time of year, viral infections are very common and prevalent,” reassures Dr Perry. “A simple cold is a viral infection of the nose and throat and normally short-lived and harmless. You can expect a cold to last seven to 10 days, sometimes a little longer depending on lifestyle. The main symptoms of a cold will be runny nose, sore throat, congestion, raised temperature, fatigue, muscle aches and a mild cough.”

Or flu?

Flu is everywhere this year. Some symptoms are similar to those of a cold, including having a cough and sore throat, but others include high temperature, aching muscles, headaches and loss of appetite. In fact, it sounds a lot like Covid…

What about Covid?

“It is more common to have other symptoms present if it is Covid,” explains Dr Perry. “You’re more likely to have a cough, loss of smell and fever, fatigue and muscle aches, so if you feel it is more than just a cold, it’s best to take a Covid test to be sure.”

Or strep A?

Strep A generally presents as a prolonged sore throat with an accompanying rash, which feels like sandpaper, or strawberry tongue where white lumps appear. Look out for any problems breathing and swallowing and worsening symptoms which last longer than a couple of days and show no sign of improvement.

Cold, Covid, flu or strep A? Here’s how to tell what you've got before heading home for Christmas