What are science behind new mrna vaccines?

The new mRNA vaccines work by teaching your body how to fight sickness using a special message made of tiny building blocks called mRNA.

Imagine you're playing with Legos, and someone gives you instructions on how to build a robot. Your body is like that robot, it follows the instructions to make something new inside you that helps you stay healthy.

The mRNA in the vaccine is like a note that says, "Build a special fighter!" This note tells your cells to make a piece of sickness (like part of a virus), which then trains your body’s defenses, kind of like how you get stronger after playing tag every day.

Once your body reads the message and makes the sickness piece, it notices it and gets ready for next time. That way, if the real sickness comes along later, your body already knows how to beat it, just like how you know what to do when you see a friend coming to play tag again!