Influenza

Influenza is an infection of the respiratory system.It is caused by virus.When the protein coating of the virus changes new strains appear.The signs and symptoms are similar to that of a cold,but often severe.When an infected person coughs or sneezes,droplets of the virus float in the air.Another person gets infected by breathing in these droplets.The virus multiplies quickly once it settles on body areas related to breathing.Rest,drinking plenty of fluids and milds medication usually get rid of influenza.However,people with prolonged or more serious symptoms have to be treated by doctors.



reference from medicine book