Why do we lose immunity to viruses over time, but our immune response to allergens stays the same?
In: 8
Constant exposure to the same allergens as opposed to sporadic exposure to the same virus. Allergens are in the environment and are nearly impossible to avoid whereas a virus is far less common particularly to the point where you are exposed to a high enough viral load to trigger an immune response. If you are not repeatedly exposed to the same antigen you may lose immunity overtime as your body “forgets” how to fight it. IE you lose the memory immune cells.
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