ELI5: Explain Like I'm 5

Immune system

Your immune system helps to keep you safe from infection and disease. It's kind of like a team of superheroes that protects your body from anything bad. Your immune system is made up of a lot of different parts, including white blood cells, antibodies, and even your skin. White blood cells are like tiny soldiers that search your body for anything bad like germs. Antibodies are like sticky tape that capture and stick to anything bad, so it can’t hurt you. Even your skin helps protect you by keeping out germs and other things that are bad for you.