ELI5: Explain Like I'm 5

Mask

A mask is like a superhero's costume that they wear over their face. It helps to protect them and others from germs and sickness. Just like how we wear our jacket when it's cold outside to keep ourselves warm, we wear a mask to keep ourselves safe from germs. It's like a barrier that stops the germs from reaching our nose and mouth, where they can make us sick. We put on our mask when we go to crowded places or when we are around people who might be sick. By wearing our mask, we are keeping ourselves and others safe and healthy.