The influenza virus attacks the respiratory tract and as a result it causes symptoms. The typical symptoms of influenza are:
Some of these symptoms are present also in the common cold and this might at first confuse the diagnose. This is because both influenza and cold are viral infectious diseases that affect the respiratory system, but they are caused by different viruses and produce different effects.
- Body aches
- Tiredness (can be extreme)
- Sore throat
- Dry cough
- Nasal congestion
Influenza's effects are much more severe and last longer than those of the cold so it is important to know, since the beginning, whether it is just cold or a flu. In some cases we may have both.