Give some examples of allergens and explain their routes of accessto the body.

Basic definition 

Allergens as the name suggests are the things which causes allergies. The allergies include rashes, swelling, itching, coughing, shortness of breath etc.

In our body we have immune system which are basically the group of cells or tissues which work together in order to protect ourselves from infections. They releases some chemicals which are proteinaceous in nature basically called antibodies. These antibodies then fights with the infection or Allergens in repose our body shows symptoms like fever, swelling, rashes etc. 

COMMON ALLERGENS 

• Pollen grains 
• Animal dander 
• Molds
• Dust
• Mites
• Nuts
• Milk
• Medicine like penicillin etc.
• Insect stings