类毒素是外毒素经甲醛处理之后,去其毒性而保留抗原性的用于自动免疫的生物制剂。

作者: rantiku 人气: - 评论: 0
问题 类毒素是外毒素经甲醛处理之后,去其毒性而保留抗原性的用于自动免疫的生物制剂。
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