The Japanese word for Japan is æ¥æ¬, which is pronounced Nippon or Nihon and literally means the origin of the sun. The earliest record of the name Nihon appears in the Chinese historical records of the Tang dynasty, the Old Book of Tang.
Primary versus Secondary Immune Response The primary immune response occurs the first time that the immune system comes in contact with the antigen.
Difference Between Primary and Secondary Immune Response | Immune Response. Difference Between Primary and Secondary Immune Response ! Imagine a person is never exposed to a particular immunogen. For the first time in his life one antigen enters into his body (this event is called Priming). This leads to a relatively week, short-lived immune responses called Primary immune responses.