Some tumor cells (e. g., t lymphoma EL4 cells) express CD47 and block phagocytosis of phagocytes in order to escape from the surveillance of immune system.
一些肿瘤细胞譬如T细胞淋巴瘤el 4细胞等也表达CD 47分子，抑制机体吞噬细胞功能逃逸免疫系统的免疫监视。
This result may imply that the escape of SARS virus from human immune surveillance may be the causality plays av…
由此表明，SARS病毒引起人类发生严重疾病的原因可能与该病毒逃避机体免疫识别有关。
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