natural acquired immunity

基本解釋

Objective:To compare the functions of natural immunity and acquired immunity in patients with primary gallbladder carcinoma (PGC) before operation after operation.
目的：探討原發(fā)性膽囊癌患者手術(shù)前後機躰自然免疫防禦機能和後天獲得性免疫機能的對比結(jié)果。
But knowing how much natural immunity has been acquired through infection is more difficult, especially given the very mild nature of illness in the vast majority of patients.
但很難說清因感染獲得了何種程度的天然免疫力，尤其是因爲(wèi)在絕大多數(shù)患者身上，疾病的性質(zhì)非常溫和。