Why are measles outbreaks increasing in some regions?

Measles outbreaks are increasing because some people aren't getting vaccinated anymore.

Imagine you and your friends are playing a game where everyone has to wear a special shield that keeps them safe from a sneaky monster called Measles. If most of your friends still wear their shields, the monster can’t hurt anyone much. But if some kids stop wearing theirs, maybe because they think it’s not needed or they don’t like the way it feels, then the monster has more chances to sneak in and make people sick.

Sometimes, people forget about the shield, just like you might forget your lunch on a busy day. Or maybe someone says the shield doesn’t work anymore, so they take it off. If enough people stop wearing their shields, then the monster can spread more easily.

When the monster spreads to more people, especially those who are little or have weaker shields, it becomes harder to stop. It’s like when a small group of kids start a game, they’re easy to beat, but if all the kids join in, it becomes a big, loud, hard-to-stop game!

So, the fewer people wearing their shields, the more likely the monster is to grow strong and cause bigger outbreaks.