immunity
/ɪˈmjuːnətɪ/noun
(pl. -ies)［mass noun］
1- the ability of an organism to resist a particular infection or toxin by the action of specific antibodies or sensitized white blood cells免疫力：
immunity to typhoid seems to have increased spontaneously.
对伤寒的免疫力似乎已经自然地加强了。
1.1
- protection or exemption from something, especially an obligation or penalty保护; 免除（某物, 尤指免除义务或责罚）：
the rebels were given immunity from prosecution.
叛乱者得以免受起诉。
1.2
- Law officially granted exemption from legal proceedings【律】豁免。
1.3
immunity to
lack of susceptibility, especially to something unwelcome or harmful抗扰度：products must have an adequate level of immunity to interference
产品必须有足够的抗干扰度
count noun exercises designed to build an immunity to fatigue.为抗疲劳设计的锻炼。
词源
late Middle English （ in the sense 'exemption (from a liability) '）： from Latin immunitas， from immunis （see IMMUNE）.