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　　【健??(jian)·生??(sheng)活??(huo)】　　老??(lao)年??(nian)期??(qi)免??(mian)疫??(yi)系??(xi)統(tǒng)?(tong)如??(ru)同??(tong)“老??(lao)兵??(bing)”??，經??(jing)驗??(yan)豐??(feng)富?(fu)但??(dan)機??(ji)能?(neng)衰??(shuai)退??(tui)??，需??(xu)針??(zhen)對??(dui)性??(xing)維?(wei)護??(hu)以??(yi)降??(jiang)低??(di)重?(zhong)癥??(zheng)風??(feng)險??(xian)??。??這??(zhe)一??(yi)時??(shi)期??(qi)的??(de)免??(mian)疫??(yi)特??(te)點??(dian)??，一??(yi)是??(shi)T細??(xi)胞??(bao)功??(gong)能??(neng)退??(tui)化??(hua)??，記??(ji)憶??(yi)T細??(xi)胞??(bao)主??(zhu)導??(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?(zhi)量??(liang)降??(jiang)低??(di)??，疫??(yi)苗??(miao)應??(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??(guan)疾??(ji)病??(bing)發(fā)??(fa)病??(bing)風??(feng)險??(xian)上??(shang)升??(sheng)：免??(mian)疫??(yi)監(jiān)??(jian)視??(shi)功??(gong)能??(neng)減??(jian)弱??(ruo)??，無??(wu)法??(fa)及??(ji)時??(shi)清??(qing)除??(chu)突??(tu)變??(bian)細??(xi)胞??(bao)??。。