Influenza, also known as flu, is the clinical condition that results from infection with influenza
viruses. The main effects of the influenza viruses are on the upper respiratory tract, the nose
and throat, with possible spread and involvement of the lungs and bronchi.
The disease is highly contagious and it has potential to cause wide spread epidemics affecting sizeable portion of a population at any time
The disease is highly contagious and it has potential to cause wide spread epidemics affecting sizeable portion of a population at any time