Once upon a time, in a far-off kingdom, there lived tiny creatures called germs. These germs were everywhere and could be found on everything from the ground, to the air, and even on people's skin.
One day, a particularly harmful germ called a virus appeared. It could make people very sick and was spreading quickly through the kingdom. The people of the kingdom were worried and didn't know what to do.
The king of the kingdom called upon the wise old doctor who lived in the castle. The doctor knew all about germs and viruses and knew that the key to fighting the virus was to build immunity. He explained that immunity is when the body can fight off germs and viruses on its own.
The doctor knew that there were tiny creatures called microorganisms that live in our bodies and help us build immunity. He also knew that when a germ or virus enters the body, it is called a host. He explained that the microorganisms in the body would attack the virus and try to stop it from spreading.
But the virus was clever and could mutate, or change its shape, to try and trick the microorganisms. The doctor knew that in order to defeat the virus, a special medicine called a vaccine would have to be made. The vaccine would teach the microorganisms how to recognize and fight the virus, even if it mutates.
The king of the kingdom ordered the vaccine to be made and soon, it was distributed to all the people of the kingdom. As they received the vaccine, their bodies began to produce special proteins called antibodies. These antibodies helped the microorganisms fight off the virus and soon, the kingdom was free from the harmful virus.
The people of the kingdom were grateful to the doctor and the king for their quick actions in protecting them from the virus. They knew that by building immunity and getting vaccinated, they were able to keep their kingdom and themselves healthy.
The end.
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