这个词是什么意思？
Live vaccines prepared from microorganisms which have undergone physical adaptation (e.g., by radiation or temperature conditioning) or serial passage in laboratory animal hosts or infected tissue/cell cultures, in order to produce avirulent mutant strains capable of inducing protective immunity.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D014613 · MeSH 2026。
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