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Vaccines teach the immune system to fight against viruses.



Older people have more chances to fight against viruses than young people because they have more versatile antibodies in their bodies. 

The immune system stores antigens and genetic material of viruses and bacteria. In chemical memory. That chemical memory allows the immune reaction to react faster and more effectively to infections. When the immune cells are winning the battles against viruses and bacteria. 

They store the genetic information of the successful actions in the genetic memory of the immune system. That genetic information would help the immune system fight against similar viruses in the case that it faces it again. In that genetic databank is stored the knowledge of the antigen of virus and which antibody was the most effective. 

When the immune system fights against viruses. It follows the level of the micro-organisms in the blood and tissues. When cells are destroying they are sending chemical marks of that to blood. And following that mark, the immune system will notice that the destruction of cells is slowing. 

Also, cells are sending chemical marks that they are working right. That mark tells the immune system that the cell is alright. That is one reason why cells have ion pumps.  If something disturbs that mark it means that a virus or some other thing disturbs the actions of those cells. And if that mark is getting low the immune cells will destroy those cells. 

The immune defense of the human body is learning. When the person gets a virus infection the immune system will start to fight against it. During that process, the immune cells are storing the data of the virus type or its antigens. And the most effective antibodies in the genetic memory.

That means the immune defense of the human is unique because we all get little bit different infections. Things like vaccines are also modifying the immune systems. So all of us have individual genetic information stored in the memory of the immune system. So when the person is aging. That means the immune system can find faster the antigens that it need to destroy. 

There is more data stored in the genetic memory that controls the immune system. When a person is aging in a normal environment that thing will increase the level of the stored genetic material. And that allows the immune system can react faster to infections. That is the idea of vaccination. The immune system will learn to fight against viruses and bacteria by storing the genetic material and data of the antigens in its memories. 


https://www.nature.com/articles/s41577-020-0339-9


https://scitechdaily.com/covid-19-the-older-you-are-the-more-antibodies-you-have-better-protection-against-delta-variant/


Image:https://www.nature.com/articles/s41577-020-0339-9


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