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.
Clonal selection is part of the primary immune response. A primary immune response is provoked when a new antigen invades the body. Traveling through the circulatory system, the antigen will inevitably meet up with the lymphocyte that has the correct antibody pattern.