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學(xué)習(xí)快評(píng)丨qibao666888　　嬰??(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??(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??(lai)母??(mu)體??(ti)通??(tong)過??(guo)胎??(tai)盤?(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)??。　　免??(mian)疫??(yi)系??(xi)統(tǒng)??(tong)的??(de)發(fā)??(fa)育?(yu)如??(ru)同??(tong)建??(jian)造??(zao)一??(yi)座??(zuo)城??(cheng)堡??(bao)??，需??(xu)要??(yao)從??(cong)地??(di)基??(ji)開??(kai)始??(shi)逐??(zhu)步??(bu)完?(wan)善??(shan)??。?。