Basic purpose of this article is to explain what are the Respiratory Infections. Almost all respiratory illnesses are due to viruses. Respiratory infections may be of varying kinds. They often affect the upper respiratory system and the term covers infection with the nose, throat, mouth, larynx, sinuses and also pharynx. These infections include conditions including sinusitis, laryngitis and tonsillitis plus the common cold. Influenza is a condition that affects the upper respiratory system, but it is not categorized as a respiratory infections. Here also analysis symptoms and some home remedies.