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.
The secondary immune response occurs the second time (3rd, 4th, etc.) the person is exposed to the same antigen. At this point immunological memory has been established and the immune system can start making antibodies immediately.
Any subsequent immune response to an antigen is called a secondary response and it has. 1  a shorter lag time, 2  more rapid buildup, 3  a higher overall level of response,  a more specific or better fit to the invading 1  antigen, utilizes IgG instead of the large multipurpose antibody  IgM.