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.
People do not develop a secondary immune response to influenza because. A. the immune system mutates from season to season. B. flu vaccines are not always effective. C. secondary immune responses are only possible against bacteria. D. the primary immune response is sufficient to protect against flu.