Vaccines work in a complex way. The human immune system is broken into two parts, the innate immune system and the adaptive immune system. The innate immune system is made up of components such as skin, mucus, and macrophages that engulf cells to destroy them. The innate immune system is something that all humans have. Vaccines work with the adaptive immune system. This part of the immune system can remember antigens by producing antibodies that bind to them. Vaccines expose the adaptive immune system to weakened or dead antigens. The adaptive immune system builds antibodies against the weakened or dead antigen so that when a live version of that antigen invades the body an immune response can be triggered immediately. Without the adaptive immune system the innate immune system would be overwhelmed and the host human would experience symptoms of disease.
Comments
Suggestion
"The innate immune system is something that all humans have"
This sounds a bit awkward to me, maybe replacing a word like something and re-phrasing. For example: The innate immune system is present in all humans.
You should explain what
You should explain what antibodies and antigens are because a non-scientist person might not know what they are and what are they good for in a person's immune system.
Comment 3
Good info. I would either strengthen the first sentence, making it into a clear topic sentence, or relocate it further into the paragraph after describing the immune system. Opening with a general sentence about vaccines and then talking about the immune system seems disorganized.