1、im- "not, opposite of" => "这里引申为：free from, exempt from" + muno- + therapy.
2、字面含义：free from or exempt from public service or duty, exempt from service or obligation. 也就是不用做公共服务，免除了公共服务。
3、按咱们古代的说法：就是不用服劳役。由此引申为：豁免、免除、免疫。

1. For the time being, however, immunotherapy is still in its experimental stages.

但免疫疗法目前仍处于实验阶段。

来自柯林斯例句

2. Treatment, though - whether it's chemotherapy or immunotherapy - will tilt the odds in her favour.

不过,治疗一下 -- 不管是化学疗法还是免疫疗法 -- 总会使情况对她有利.

来自辞典例句

3. Tumor immunology and immunotherapy are but one of the exciting areas in cancer research.

肿瘤免疫学与免疗不过是癌瘤研究中这些鼓舞人心的领域之一.

来自辞典例句

4. Greater variability carries with it a greater likelihood of resistance to chemotherapy and immunotherapy.

较大的变异性带来了对化学疗法与免疫疗法更大的抗性能力.

来自辞典例句

5. Active specific immunotherapy ( ASI ) is a important way in tumor therapy.

研究认为,主动特异性 免疫治疗 是肿瘤治疗的主要发展方向之一.

来自互联网