Allergies are a disorder of the immune system.
There are many things involved in immunity. It can be divided into two main categories:
- Positive Immunity is gained through exposure to pathogens. This can occur naturally, via exposure to disease, or artificially via vaccines.
- Negative or non beneficial immunity can be considered autoimmunity or allergies. Autoimmunity is when the body accidently attacks itself, such as when it attacks its own liver or kidneys. Allergies can be considered non beneficial (or negative) type of immunity because the body mounts an abnormally high immune response to something which should not normally be harmful, causing disease due to the immune response.
In the case of allergies, the body