Before revision: Antigenic escape, immune escape, immune evasion or escape mutation occurs when the immune system of a host, especially of a human being, is unable to respond to an infectious agent , or, in other words, the host's immune system is no longer able to recognize and eliminate a pathogen, such as a virus.
After revision: Antigenic escape, immune escape, immune evasion or escape mutation occurs when the immune system of a host, especially of a human being, is unable to respond to an infectious agent : the host's immune system is no longer able to recognize and eliminate a pathogen, such as a virus.