Cold and flu have slightly different symptoms because they are caused by different viruses. In fact, there are approximately 200 different cold viruses but just 3 main flu viruses that most of us need to worry about. However, the obvious difference is that flu can cause a more severe infection.
Cold symptoms often begin with a sore throat. After one or two days, this typically gives way to nasal symptoms and congestion along with a cough. Fever is uncommon in adults, but a slight fever is possible. Children are more likely to have a fever with a cold.
Flu symptoms come on more quickly than cold symptoms. Symptoms of flu include fever, sore throats, headaches, muscle aches, fatigue, congestion and coughs. Most flu symptoms will usually peak after two to three days and you should begin to feel much better within five to eight days. Seasonal influenza is not usually associated with diarrhoea and vomiting, at least not in adults. However, these symptoms appear with stomach flu, which is a popular but inaccurate term for gastroenteritis.