a situation in which you are protected against disease or from legal action免疫;免除;豁免
The vaccination gives you immunity against the disease for up to six months.注射这种疫苗会使你对这种疾病有长达6个月的免疫力。
He was granted immunity from prosecution because he confessed the names of the other spies.他因供出了其他间谍的名字而免受起诉。