It can cause illness ranging from mild to severe,. Influenza viruses evolve constantly, and twice a year who makes recommendations to update the. Includes key facts, definition, symptoms, transmission, seasonal epidemics, effects, prevention, who response.
It can cause mild to severe illness. Seasonal influenza is an acute respiratory infection caused by influenza viruses which circulate in all parts of the world. Therefore, we asked children from the different countries to draw the symptoms of the flu and.
The flu happens every year, worldwide. 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. Influenza is an acute viral infection that primarily attacks the upper respiratory tract, including the nose, throat, bronchi and, less frequently, the lungs.
The most common symptoms of influenza (flu) include fever, a dry cough, headache, muscle and joint pain, a sore throat and a runny nose. It is characterized by a sudden onset of fever, cough. Influenza (flu) is a contagious respiratory illness caused by influenza viruses. All of us might be potentially affected by the flu.
Every year, mainly during the winter season, seasonal influenza infects as many as 1 billion people. This makes it one of the most.