Before they can seek out these smaller, hidden deposits of tumors, however, cancervaccines must prove that they can actually target and shrink a cancer's more conspicuous growths.
在使用用癌症疫苗找出更小更隐蔽的肿瘤前，必须先验证它们确实能针对特定癌症并且使快速生长的癌肿缩小。
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But the two for cervical cancer are the latest in a wave of high-priced vaccines that have come to market since 2001, opening a lucrative new field.
The detailed understanding of the immune system provided by the new Nobel laureates has given other researchers the ability to improve vaccines and to attempt to stimulate immune reactions to cancer.