What is antigen?
The antigen is a harmful substance that enters the host body and after that which causes the body to make antibodies as a response to fight off that disease caused by that antigen.
A substance That enters the body and start a process that can cause disease. The body then usually produces Substances to fight the integer
antigen is the foreign substance or organism that enters to the body of the host, all antigens are not pathogenic
A toxin or other foreign substance which induces an immune response in the body, especially production of antibodies.