后天性免疫 hòutiānxìngmiǎnyì acquired immunity
The defense capability of a vertebrate's body to produce antibodies after birth when stimulated by antigens or vaccines; also called [[获得性免疫|獲得性免疫|huo4 de2 xing4 mian3 yi4]] or [[适应性免疫|適應性免疫|shi4 ying4 xing4 mian3 yi4]]