What are susceptibility to certain diseases?

Susceptibility to certain diseases means some people are more likely to get sick from specific problems than others.

Imagine you and your friend both play outside in the rain. But while you stay dry under a big tree, your friend gets completely soaked. Because of that, your friend might catch a cold easier, they're more susceptible to getting sick from being wet.

Some people have a kind of body armor that helps them fight off sicknesses better than others. Think of it like having a stronger shield when the germs come in for attack.

For example, if someone has a weaker immune system, they might get sick more often from the same germ that only gives you a tiny sniffle. It's like having a smaller shield, the germs can push through easier.

Sometimes this happens because of how their body is built, or maybe something in their family history. Just like some kids are better at climbing trees than others, it's all part of being different and unique!