What is the flu?
Influenza, commonly known as the flu, is an annually recurring illness during the cold seasons, which is caused by influenza viruses. The disease is easily transmitted through droplets (e.g., coughing, sneezing, talking) and direct contact. Symptoms include high fever, cough, headache and aching limbs. Influenza should not be confused with the common cold because the latter, unlike influenza, is usually mild and can be caused by a variety of other pathogens.