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假设你现在身处人群之中,身旁有个人恰巧染上流行性感冒,他朝你的方向打了一个喷嚏。这时,你口腔内、鼻子内和皮肤上的抗菌物质就会立即动员起来,阻止流感病毒的入侵。如果这些抗菌物质最终抵挡不住病毒的入侵,病毒便可能攻进你的身体,侵入细胞,繁殖起来。于是,你身体内的防御系统启动。脾脏和淋巴结发现了入侵者,发出求援信号。名为 T 细胞的白细胞随即出动,追寻并尽力歼灭病毒。B 细胞也出动支援,形成第二道防线。这些 B 细胞会生产有特定功能的抗
Suppose you are in a crowd right now and someone next to it is just getting caught in the flu and he sneezes in your direction. At this moment, the antibacterial substances in your mouth, nose and skin will be immediately mobilized to stop the invasion of the influenza virus. If these antibacterial substances can not withstand the invasion of the virus in the end, the virus can invade your body, invade cells and multiply. So, your body’s defense system starts. Spleen and lymph nodes were found intruders, issued a signal for help. White blood cells called T cells immediately dispatched to pursue and try to wipe out the virus. B cells also sent support, the formation of the second line of defense. These B cells produce a functionally specific anti-body