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　　免??(mian)疫?(yi)系??(xi)統(tǒng)?(tong)的??(de)智祝(zhi)慧??(hui)??，不??(bu)在??(zai)于??(yu)“消??(xiao)滅??(mie)一??(yi)切??(qie)”??，而??(er)在??(zai)于??(yu)“辨??(bian)明??(ming)敵??(di)我??(wo)”??，維??(wei)持?(chi)“動(dòng)??(dong)態(tài)??(tai)平??(ping)衡??(heng)”??。??它??(ta)像??(xiang)一??(yi)位??(wei)經(jīng)??(jing)驗(yàn)??(yan)豐??(feng)富??(fu)的??(de)指??(zhi)揮??(hui)官??(guan)??，既??(ji)能??(neng)調(diào)??(tiao)動(dòng)??(dong)兵??(bing)力??(li)快??(kuai)速??(su)殲??(jian)敵??(di)??，又??(you)能??(neng)及??(ji)時(shí)??(shi)收??(shou)兵??(bing)避??(bi)免??(mian)誤??(wu)傷??(shang)??。盲??(mang)目??(mu)追??(zhui)求??(qiu)“增??(zeng)強(qiáng)?(qiang)免??(mian)疫??(yi)力??(li)”??，只??(zhi)注??(zhu)重??(zhong)免??(mian)疫??(yi)防??(fang)御??(yu)??，忽??(hu)略??(lve)免??(mian)疫??(yi)監(jiān)??(jian)視??(shi)與??(yu)免??(mian)疫??(yi)自?(zi)穩(wěn)??(wen)??，失?(shi)去??(qu)對(duì)?(dui)免??(mian)疫?(yi)防??(fang)御??(yu)的??(de)調(diào)??(tiao)控??(kong)??，反??(fan)而?(er)會(huì)??(hui)打?(da)破??(po)這??(zhe)種??(zhong)微??(wei)妙??(miao)的??(de)平??(ping)衡?(heng)??。人??(ren)體??(ti)免??(mian)疫?(yi)系?(xi)統(tǒng)??(tong)的??(de)偉??(wei)大??(da)??，就??(jiu)在??(zai)于??(yu)懂??(dong)得??(de)何??(he)時(shí)??(shi)進(jìn)??(jin)攻??(gong)??，何??(he)時(shí)??(shi)休?(xiu)戰(zhàn)??(zhan)??。　　老??(lao)年??(nian)期??(qi)免?(mian)疫??(yi)系??(xi)統(tǒng)??(tong)如??(ru)同??(tong)“老??(lao)兵??(bing)”??，經(jīng)??(jing)驗(yàn)??(yan)豐??(feng)富??(fu)但??(dan)機(jī)??(ji)能??(neng)衰??(shuai)退??(tui)??，需??(xu)針??(zhen)對(duì)??(dui)性??(xing)維??(wei)護(hù)??(hu)以??(yi)降??(jiang)低??(di)重??(zhong)癥??(zheng)風(fēng)??(feng)險(xiǎn)?(xian)??。??這??(zhe)一??(yi)時(shí)??(shi)期??(qi)的??(de)免??(mian)疫??(yi)特??(te)點(diǎn)?(dian)??，一??(yi)是??(shi)T細(xì)??(xi)胞??(bao)功??(gong)能??(neng)退??(tui)化??(hua)??，記??(ji)憶??(yi)T細(xì)??(xi)胞??(bao)主??(zhu)導(dǎo)??(dao)??，但??(dan)清??(qing)除??(chu)病??(bing)原??(yuan)體??(ti)能??(neng)力??(li)下??(xia)降??(jiang)；二??(er)是??(shi)抗??(kang)體?(ti)質(zhì)??(zhi)量??(liang)降??(jiang)低??(di)??，疫??(yi)苗??(miao)應(yīng)??(ying)答??(da)減??(jian)弱??(ruo)??，感??(gan)染??(ran)(如??(ru)肺??(fei)炎??(yan)、帶??(dai)狀??(zhuang)皰??(pao)疹??(zhen))易??(yi)重??(zhong)癥??(zheng)化??(hua)；三??(san)是??(shi)衰??(shuai)老??(lao)相?(xiang)關(guān)??(guan)疾??(ji)病??(bing)發(fā)??(fa)病?(bing)風(fēng)??(feng)險(xiǎn)??(xian)上??(shang)升??(sheng)：免??(mian)疫??(yi)監(jiān)??(jian)視??(shi)功??(gong)能?(neng)減??(jian)弱??(ruo)??，無(wú)??(wu)法??(fa)及?(ji)時(shí)?(shi)清??(qing)除??(chu)突??(tu)變?(bian)細(xì)??(xi)胞??(bao)??。。