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.
What is the diffÃ©rence entre primary and secondary immune deficiency? primary: name given to chronic diseases caused by hereditary or genetic disorders of the immune system. Secondary immunodeficiencies or acquired more common than primary deficits, are immune system problems that are not genetic and which are caused by external factors. This question is archived.