Allergy is a reaction of your immune system to something that doesn’t affect other people very commonly.
Substances usually causing allergy are:
- Mold spores
- Pet dander
- Insect stings etc
Normally our immune system fights germs i.e our defence system of body. But in allergy it responds to a wrong thing.
- Running nose
Allergies are usually not life threatening unless they are not very severe. i.e anaphylaxis.