What are vaccine antigens?

Vaccines help your body get ready to fight germs by introducing antigens, which are like tiny clues that tell your body what to look for.

Imagine you're playing hide and seek in a big house. The person hiding is like a germ, they’re trying to stay hidden so they can catch you when you’re not looking. Now, the antigen is like a small piece of clothing the hider wears, it helps you know who to look for. Your body uses this clue to recognize the germ and then fights it off.

When you get a vaccine, your body meets these tiny clues (antigens) from the germs that cause diseases. It’s like meeting a friend before a big game, you know what they look like, so when the game starts, you can spot them quickly and win.

Your immune system then remembers these antigens, so next time the real germ comes along, your body can fight it faster, sometimes even before you feel sick!