Question

what is flu?
Give me a definition please​

Answer 1

Answer:

A common viral infection that can be deadly, especially in high-risk groups.

The flu attacks the lungs, nose and throat. Young children, older adults, pregnant women and people with chronic disease or weak immune systems are at high risk.

Answer 2

Answer:

Influenza is a viral infection that attacks your respiratory system — your nose, throat and lungs. Influenza is commonly called the flu, but it's not the same as stomach "flu" viruses that cause diarrhea and vomiting.

hope it is helpful