Why are antibodies different for each antigen?
Antibodies are specific to each antigen, just like a lock and a key. At the top of each antibody is an area called the variable region, this region is different for each antibody and is specific for fighting each different type of antigen. When you get a cold, a virus, your body looks through its antibodies to see if any of them are the proper key used to kill the cold virus. If you do not have the right “key” you body makes new antibodies to fight the antigen. Hopefully your body will produce the right key quickly!!
