Pathogenic viruses

Hey kiddo, do you know what a virus is? It's a tiny thing that can make you sick if it gets inside your body. Kind of like a bad guy sneaking into your house and causing trouble.

Well, some viruses are pathogenic, which means they have the ability to cause disease in humans or animals. They're like the worst kind of bad guy because they make us feel really sick.

See, these viruses have things called proteins on their outer layer. These proteins are like keys that can unlock certain cells in our bodies. Once they get inside those cells, they start to multiply like crazy. Kind of like a toy that keeps making copies of itself.

As those viruses keep multiplying, they start to damage our healthy cells. That's what causes us to feel sick. Some viruses can cause colds or flu, while others can be really serious, like Ebola or HIV.

The good news is that our bodies have ways to fight off these pathogenic viruses. We have things called white blood cells that can attack and destroy the viruses. And if we get sick, we can take medicine or get a vaccine to make us feel better and even prevent us from getting sick in the first place.

So remember, viruses are like bad guys who can make us sick, and pathogenic viruses are the worst kind of bad guys because they can cause disease. But our bodies and medicine can help protect us!