The common cold and its spread is a familiar topic for many, as respiratory illnesses are frequent during the cold seasons. Many tend to believe that the cold is merely a consequence of cold air and does not count as a real infection. However, the reality is that colds are caused by viruses that can spread easily, although not everyone becomes ill from them. It is worthwhile to understand more deeply what lies behind this and what factors influence the development of a cold. The viruses that cause colds The viruses that cause colds reside in the respiratory tract and can enter the body through the respiratory organs. Cold weather…