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　　首??(shou)先??(xian)要??(yao)識(shí)??(shi)別?(bie)“自?(zi)我??(wo)”與??(yu)“非??(fei)我??(wo)”??。??通??(tong)過(guò)??(guo)細(xì)??(xi)胞??(bao)表??(biao)面??(mian)的??(de)特??(te)殊??(shu)蛋??(dan)白??(bai)(如??(ru)MHC分??(fen)子??(zi))區(qū)??(qu)分??(fen)自??(zi)身??(shen)細(xì)??(xi)胞??(bao)和??(he)外??(wai)來(lái)??(lai)病??(bing)原??(yuan)體??(ti)??。一??(yi)旦??(dan)誤??(wu)判??(pan)??，可??(ke)能??(neng)攻??(gong)擊??(ji)自??(zi)身??(shen)組??(zu)織??(zhi)??，導(dǎo)??(dao)致??(zhi)類??(lei)風(fēng)??(feng)濕??(shi)關(guān)??(guan)節(jié)??(jie)炎??(yan)、1型??(xing)糖??(tang)尿??(niao)病??(bing)等??(deng)疾??(ji)病??(bing)???！　】??(zong)的??(de)來(lái)??(lai)說(shuō)??(shuo)??，先??(xian)天??(tian)性??(xing)免??(mian)疫??(yi)的??(de)特??(te)點(diǎn)??(dian)是?(shi)反??(fan)應(yīng)??(ying)快??(kuai)、無(wú)??(wu)差??(cha)別??(bie)攻??(gong)擊??(ji)??，但??(dan)缺??(que)乏??(fa)“記??(ji)憶??(yi)功??(gong)能??(neng)”??，無(wú)??(wu)法??(fa)針??(zhen)對(duì)??(dui)特??(te)定??(ding)敵??(di)人??(ren)提??(ti)升??(sheng)戰(zhàn)??(zhan)斗??(dou)力??(li)??。??。