Question: How are antibodies created in our body?

Juan Ortiz answered on 17 Jun 2016:

The antibodies are proteins produced by a type of cells called B CELLS. The function of the antibodies is to block a specific pathogen in order to destroy it very efficiently and prevent it from spreading, so the disease can be stopped even before it happens.
To produce an antibody it is necessary that at least one of your B cells makes contact with a pathogen and is capable of specifically recognise that pathogen. Not all the pathogens are recognised by all the B cells only few B cells can recognise a specific pathogen. This recognition has to be perfect like a key and a keyhole and happens through a protein that the B cells have on their membrane and is similar to an antibody but is attached to the cell (antibodies are floating free in your blood). So you need to be infected by a pathogen and get a disease to produce antibodies against it. When the specific recognition happens the B cell involved gets crazy and starts replicating creating cells that are exact copies of itself. These cells will release the proteins involved in the recognition of the pathogen. These released proteins are what we call ANTIBODIES. These cells will live for many years and will always produce antibodies against the same disease. This is the reason why once you have a disease like measles you will never have it again. Your B cells can “remember” a pathogen no matter how many years have passed. We call this IMMUNOLOGICAL MEMORY.