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　　在??(zai)人??(ren)類?(lei)演??(yan)化??(hua)的??(de)長??(chang)河??(he)中??(zhong)??，人??(ren)體??(ti)免?(mian)疫??(yi)系??(xi)統(tǒng)??(tong)猶??(you)如?(ru)一??(yi)座??(zuo)精??(jing)密??(mi)設(shè)??(she)計??(ji)的??(de)防??(fang)御??(yu)工??(gong)事??(shi)??，其?(qi)運??(yun)作??(zuo)機??(ji)制??(zhi)既??(ji)展??(zhan)現(xiàn)?(xian)著??(zhe)生??(sheng)命??(ming)演??(yan)化??(hua)的??(de)智??(zhi)慧??(hui)??，也??(ye)蘊??(yun)含??(han)著??(zhe)醫(yī)??(yi)學??(xue)干??(gan)預(yù)??(yu)的??(de)啟??(qi)示??(shi)??。??猶??(you)如??(ru)一??(yi)個??(ge)“隱??(yin)形?(xing)盾??(dun)牌??(pai)”??，免??(mian)疫??(yi)防??(fang)御?(yu)遵祝(zun)從??(cong)怎??(zen)樣?(yang)的??(de)層?(ceng)次??(ci)？??不?(bu)同??(tong)年??(nian)齡??(ling)的??(de)免??(mian)疫?(yi)特?(te)點??(dian)有??(you)哪??(na)些??(xie)？人??(ren)體??(ti)免??(mian)疫??(yi)平?(ping)衡??(heng)的??(de)本??(ben)質(zhì)??(zhi)又??(you)是??(shi)什??(shen)么??(me)？來??(lai)看??(kan)看??(kan)它??(ta)的??(de)運?(yun)作??(zuo)奧??(ao)秘??(mi)??。。