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.
More cells participate in this response than the in the primary response. The secondary response is more rapid and produces a greater amount of antibody. Moreover, the antibody concentration remains high for a much longer period. The main antibody produced during the secondary response is IgG. The secondary response is due to the activity of the B-lymphocytes (memory cells) stimulated during the primary response.