How do mRNA vaccines teach our bodies to fight viruses?

Our bodies learn to fight viruses by getting a special message that tells them what the virus looks like.

Imagine your body is like a detective squad, and the virus is a sneaky thief. The mRNA vaccine is like giving the detectives a photo of the thief’s face so they can recognize him when he shows up.

The mRNA vaccine has a message inside it, kind of like a note that says, “Here’s what the virus looks like!” When you get the shot, this message goes into your body's cells.

These cells read the message and make copies of the virus's "face", something called a protein. Your immune system sees these proteins and starts training for the real fight.

Once your body knows what the virus looks like, it gets ready to fight if the real virus comes along later. It’s like practicing for a game, when the real virus shows up, your body can beat it faster and easier.

Your detective squad is now prepared, and they don’t need to guess who the thief is, they already know!