The body responds to irritation, infection, and injury by means of inflammation. This is caused by dust, pollen grains, and grass that are generally, harmless. When the immune system reacts contrary to its own tissues, this causes an autoimmune reaction.
In terms that are more common, we can refer eCommerce as the platform for buying and selling of products and services through business and services over internet. In a simplest form people use this term as online shopping. Both the terms means one and the same thing.