Being exposed to something your allergic to can potentially cause you to be sick. Being sick is your body's way of slowing down your cognitive functions, so that it can focus on getting rid of the thing that is making you sick.
Example: If you are allergic to peanuts, and you eat one, there is a high chance that you will be sick.
If you have an allergy you cannot handle ANY amount of an allergen, if you have any intolerence you may be able to handle small amounts or the allergen or traces, before you become ill.
An allergy is the reaction that the body will have, where as an allergen is something that causes the allergy to occur.
An aeroallergy is an allergy to an airborne allergen.
Yes, it's not the most common allergy but it is known as an allergen for some.
allergen
Yes, an allergy can cause a fever as part of the body's immune response to the allergen.
The food allergy is a more general statement. If I say I'm allergic to peanuts I am not allergic to every aspect of the peanut only the "allergen" i.e. the specific protein that my body is reacting to. In theory if I was able to remove that protein or allergen I would be able to eat the peanut
allergy
Brands of Allergy Free Filters sold in Canada are Allergy-Free Filter, AchooAllergy, Ridgid 5-layer allergen Filter and Douglas Vacuum and Allergy Relief.
Avoidance of the allergen/s (the cause/s) is a good approach.
In radio-allergosorbent allergy testing (RAST), a patient's blood serum is combined with allergen in a test tube to determine if serum anti-bodies react with the allergen.
Swine flu is caused by a virus. An allergy is caused by the body reacting to a harmless compound.