An URTI is an infection of your upper respiratory tract. This includes your throat, nose, pharynx, larynx, sinuses, and trachea (windpipe). This upper portion of your airway is susceptible to many bacterial and viral infections that can cause a range of symptoms, with varying degree of severity.
What is the main cause of URTI?
URTIs are usually caused by several families of virus; these are the rhinovirus, coronavirus, parainfluenza, respiratory syncytial virus (RSV), adenovirus, human metapneumovirus, influenza, enterovirus and the recently discovered bocavirus.