Flu and colds are often confused because their symptoms are similar. Although both are respiratory infections, the common cold is not as serious as the flu. Both conditions are usually accompanied by cough, fatigue and sometimes nausea, vomiting and discomfort in the chest. However, sneezing, runny nose, nasal congestion and sore throat are more typical to seasonal cold symptoms. If you have a fever, experience intense headaches and suffer from aches and pains, you probably have the flu and you should consult a doctor.
Note that in either case, the symptoms and their severity can vary depending on the person’s age and state of health.