What is virus?

A virus is like a tiny sneaky guest that wants to play inside your body and make you feel sick.

Imagine you have a toy box full of happy toys, these are the healthy cells in your body. A virus is like a small, invisible intruder that jumps into the toy box without asking. Once it's inside, it starts making copies of itself by using the toys (your cells) to build more viruses. Soon, there are so many new viruses that they crowd out the happy toys, and you feel tired or achy, just like when your toy box gets too messy.

A virus can travel through the air, like when you sneeze, or on your hands, like when you touch doorknobs. It only needs to find one cell to sneak into, and then it's off to make more trouble!

Once a virus is inside a cell, it tricks the cell into making more viruses, which can jump to other cells or even leave your body to infect someone else. That’s why when you're sick, you might spread germs to your brother or sister, they get to be the new toy box for more sneaky guests!