免疫缺陷先天的、后天的或诱发的正常免疫反应能力的缺失 An innate, acquired, or induced inability to develop a normal immune response.
贝林,埃米尔·冯1854-1917德国生理学家,因其在抗白喉与破伤风血清免疫方面的工作获1901年诺贝尔奖 German physiologist. He won a1901 Nobel Prize for work on serum immunization against diphtheria and tetanus.
我种过牛痘了,所以对天花有免疫力。 I'm immune to smallpox as a result of vaccination.
接种这种疫苗可有两年免疫力。 This vaccine will give you immunity for two years.