A virus is like a tiny troublemaker that we can’t see with our eyes. It’s so small that it can only be seen with a special tool called a microscope. Imagine if a sneaky ant wanted to come into your house and make a mess. The virus is like that ant, but much, much smaller.

Viruses are like little pirates. They can’t do anything on their own, so they look for a place to stay, like a cell in your body. Once they find a cell, they sneak inside and take over, just like a pirate ship would take over another ship. The virus then uses the cell to make more of itself, like copying a drawing many times.

Think of a virus as a copy machine that makes too many copies of a picture until the whole room is filled with paper. This can make the body feel sick because the cells are too busy dealing with all the virus copies instead of doing their usual job, like keeping you healthy and strong.