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　　其??(qi)實(shí)??(shi)像??(xiang)過(guò)??(guo)敏??(min)性??(xing)疾??(ji)病??(bing)??，就??(jiu)是??(shi)免??(mian)疫??(yi)系??(xi)統(tǒng)??(tong)將??(jiang)花??(hua)粉??(fen)、塵??(chen)螨??(man)等??(deng)微??(wei)害??(hai)物??(wu)質(zhì)??(zhi)誤??(wu)判??(pan)為??(wei)高??(gao)度??(du)危??(wei)險(xiǎn)??(xian)??，過(guò)??(guo)度??(du)反??(fan)應(yīng)??(ying)引??(yin)發(fā)??(fa)噴??(pen)嚏??(ti)、皮??(pi)疹??(zhen)甚??(shen)至??(zhi)哮??(xiao)喘?(chuan)??。??還?(hai)有?(you)自??(zi)身??(shen)免??(mian)疫??(yi)病??(bing)??，屬??(shu)于??(yu)免??(mian)疫??(yi)系?(xi)統(tǒng)??(tong)“敵??(di)我??(wo)不??(bu)分??(fen)”??，攻??(gong)擊??(ji)自??(zi)身?(shen)關(guān)??(guan)節(jié)??(jie)(如??(ru)類(lèi)??(lei)風(fēng)?(feng)濕??(shi)關(guān)??(guan)節(jié)??(jie)炎??(yan))、全??(quan)身??(shen)各??(ge)系??(xi)統(tǒng)??(tong)(如??(ru)系??(xi)統(tǒng)??(tong)性??(xing)紅?(hong)斑?(ban)狼??(lang)瘡??(chuang))或??(huo)甲??(jia)狀??(zhuang)腺??(xian)(如??(ru)橋?(qiao)本??(ben)氏??(shi)甲??(jia)狀?(zhuang)腺?(xian)炎??(yan))???！　??(ying)幼??(you)兒?(er)期??(qi)(0～3歲??(sui))?，新??(xin)生??(sheng)兒??(er)免??(mian)疫??(yi)系??(xi)統(tǒng)??(tong)像??(xiang)一??(yi)支??(zhi)未??(wei)經(jīng)??(jing)實(shí)??(shi)戰(zhàn)??(zhan)的??(de)“新??(xin)兵??(bing)部??(bu)隊(duì)??(dui)”?，先?(xian)天?(tian)性??(xing)免??(mian)疫??(yi)(如??(ru)中??(zhong)性?(xing)粒??(li)細(xì)?(xi)胞??(bao)、巨??(ju)噬??(shi)細(xì)??(xi)胞??(bao))活??(huo)性??(xing)高祝(gao)?，但??(dan)皮??(pi)膚??(fu)、黏??(nian)膜??(mo)屏??(ping)障??(zhang)薄??(bo)弱??(ruo)?，易??(yi)受??(shou)病??(bing)毒??(du)(如??(ru)呼??(hu)吸??(xi)道??(dao)合??(he)胞??(bao)病??(bing)毒??(du)、輪??(lun)狀??(zhuang)病??(bing)毒??(du))侵??(qin)襲??(xi)??。??此??(ci)時(shí)??(shi)主?(zhu)要??(yao)依??(yi)賴(lài)??(lai)母??(mu)體??(ti)通??(tong)過(guò)?(guo)胎??(tai)盤(pán)??(pan)和?(he)母?(mu)乳??(ru)傳??(chuan)遞??(di)的??(de)抗??(kang)體??(ti)(如??(ru)IgG、IgA)提??(ti)供??(gong)保??(bao)護(hù)??(hu)??。。