The flu happens every year, worldwide. It can cause illness ranging from mild to severe,. Seasonal influenza is an acute respiratory infection caused by influenza viruses which circulate in all parts of the world.
Influenza is an acute viral infection that primarily attacks the upper respiratory tract, including the nose, throat, bronchi and, less frequently, the lungs. Influenza (flu) is a contagious respiratory illness caused by influenza viruses. Influenza, or the flu, is both a seasonal and a pandemic virus.
The best way to avoid getting the flu is to get the flu vaccine every year. Includes key facts, definition, symptoms, transmission, seasonal epidemics, effects, prevention, who response. It is characterized by a sudden onset of fever, cough. All of us might be potentially affected by the flu.
It can cause mild to severe illness. Who fact sheet on influenza: The most common symptoms of influenza (flu) include fever, a dry cough, headache, muscle and joint pain, a sore throat and a runny nose. Every year, mainly during the winter season, seasonal influenza infects as many as 1 billion people.
This makes it one of the most. The virus is transmitted easily from person to person via droplets.