Influenza is a highly infectious disease that is
caused by influenza viruses. Popularly known as flu, it strikes the
upper respiratory tract, nose and throat, spreading to the lungs and
bronchi with time. Influenza has the capability to become an epidemic,
striking a large population at a single time. Though it is often
misinterpreted as common cold, influenza is caused by a different type
of virus. Nauseating feeling and a mild headache are amongst the most
common symptoms of influenza. In the following lines, we have provided
more information on the various causes and symptoms of influenza.
Causes Of Influenza






