Why is it so hard to cure the common cold?

It’s hard to cure the common cold because it can change its outfit and hide from doctors.

Think of the cold like a sneaky little kid who wears different clothes every day. One day, they wear a blue sweater. The next day, they wear a red one. Doctors try to catch them by giving medicine that works on blue sweaters, but the kid changes into a red one and slips away.

The cold also likes to hide inside your body. It sneaks in through your nose or mouth, like a tiny robber hiding in a house. Sometimes it hides so well that even the strongest medicine can't find it right away. That’s why it takes time for you to feel better, the cold is just waiting for the perfect moment to run away again.

So, doctors have to guess which outfit the cold will wear and where it might hide next, making it tricky to cure!