If the immune system recognizes only small pieces of the virus and mounts an immune response to that, how about if I just take these pieces of a virus like some structural subunit, some piece of protein and use that as a vaccine?

如果免疫系统识别出病毒的一小段,就可以诱发起免疫应答,那么如果我仅用一小部分病毒,比如一些结构性亚基 一些蛋白质的片段,来作为疫苗的话,会如何呢

耶鲁公开课 - 生物医学工程探索课程节选