Cách sử dụng
The word 'flu' is short for influenza, which is a viral infection that affects your respiratory system (your nose, throat, and lungs). You might hear people talking about the flu, especially during the winter months when it is more common. If someone says "I have the flu," it means they are feeling sick with symptoms like fever, cough, and body aches. It's important to rest and take care of yourself if you have the flu, and to take steps like washing your hands to prevent getting sick in the first place.