A vaccine contains the disease they want to protect you against. Usually the disease is dead or really weak. When it’s put into your body, something called the

a third

They got spots on their bodies and turned to dust.

Applesauce noticed that one of the baby horses had a spot on its nose. He touched the spot, to see what it was. Seconds later, a spot appeared on his fi nger- t

These spots would spread all over their body and then POOF! They would disappear and turn into dust!

a disease is a condition that makes a person (or animal or plant) unhealthy and interferes with how their body works normally. I

In Mesopotato, disease could spread really easily because there were lots of people living together.

Diseases are caused by tiny things like bacteria or viruses.

Horses

You can also become immune to a disease if you’ve already caught it.

Not everybody gets sick from diseases. This is because everyone’s body is slightly different!

In cities, there are lots of people