[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:07.83,0:00:10.94,Default,,0000,0000,0000,,將近十年嚟，科學家一直喺中國
Dialogue: 0,0:00:10.94,0:00:14.18,Default,,0000,0000,0000,,最高嘅山同最偏僻嘅山窿
Dialogue: 0,0:00:14.18,0:00:16.53,Default,,0000,0000,0000,,尋找著一種致命嘅新型病毒
Dialogue: 0,0:00:16.53,0:00:21.26,Default,,0000,0000,0000,,佢哋最終喺雲南洞穴嘅蝙蝠身上搵到
Dialogue: 0,0:00:21.26,0:00:23.49,Default,,0000,0000,0000,,呢種未知嘅病毒係一種冠狀病毒
Dialogue: 0,0:00:23.49,0:00:27.49,Default,,0000,0000,0000,,佢引發咗 2003 年\N嚴重急性呼吸綜合征
Dialogue: 0,0:00:27.49,0:00:30.74,Default,,0000,0000,0000,,即係沙士
Dialogue: 0,0:00:30.74,0:00:32.89,Default,,0000,0000,0000,,冠狀病毒係一類
Dialogue: 0,0:00:32.89,0:00:36.43,Default,,0000,0000,0000,,由細小蛋白刺突包裹嘅病毒\N佢睇起身好似一個皇冠
Dialogue: 0,0:00:36.43,0:00:38.23,Default,,0000,0000,0000,,用拉丁語講就係 corona
Dialogue: 0,0:00:38.23,0:00:41.21,Default,,0000,0000,0000,,已知嘅冠狀病毒有幾百種
Dialogue: 0,0:00:41.21,0:00:45.32,Default,,0000,0000,0000,,其中有七種會感染人類、令人病
Dialogue: 0,0:00:45.32,0:00:49.05,Default,,0000,0000,0000,,譬如話，沙士冠狀病毒會引發沙士
Dialogue: 0,0:00:49.05,0:00:51.87,Default,,0000,0000,0000,,中東呼吸綜合症冠狀病毒\N會引發中東呼吸綜合症
Dialogue: 0,0:00:51.87,0:00:56.86,Default,,0000,0000,0000,,新冠病毒就會引發新冠肺炎
Dialogue: 0,0:00:56.86,0:01:01.23,Default,,0000,0000,0000,,喺七種人類冠狀病毒之中\N四種會引致感冒
Dialogue: 0,0:01:01.23,0:01:05.32,Default,,0000,0000,0000,,鼻、喉嚨會受到輕度而高傳染性嘅感染
Dialogue: 0,0:01:05.32,0:01:10.08,Default,,0000,0000,0000,,兩種會感染肺部\N並引發更嚴重嘅疾病
Dialogue: 0,0:01:10.08,0:01:14.57,Default,,0000,0000,0000,,而第七種，即新冠病毒\N有頭六種嘅特徵
Dialogue: 0,0:01:14.57,0:01:18.93,Default,,0000,0000,0000,,佢好容易傳播\N嚴重影響肺部功能
Dialogue: 0,0:01:18.93,0:01:23.66,Default,,0000,0000,0000,,一個病毒感染者一旦咳嗽\N含有病毒嘅飛沫就開始散播
Dialogue: 0,0:01:23.66,0:01:28.50,Default,,0000,0000,0000,,當飛沫入咗鼻或者嘴\N病毒就傳染畀另一個人
Dialogue: 0,0:01:28.50,0:01:31.79,Default,,0000,0000,0000,,當好多人都喺同一個密閉空間嗰時
Dialogue: 0,0:01:31.79,0:01:33.46,Default,,0000,0000,0000,,冠狀病毒就係傳播得最犀利
Dialogue: 0,0:01:33.46,0:01:36.87,Default,,0000,0000,0000,,而天氣寒冷，令冠狀病毒\N脆弱嘅外殼免於脫水
Dialogue: 0,0:01:36.87,0:01:40.16,Default,,0000,0000,0000,,令佢哋喺宿主之間生存得更耐
Dialogue: 0,0:01:40.16,0:01:43.74,Default,,0000,0000,0000,,陽光中嘅紫外線\N或者可以破壞脆弱嘅外殼
Dialogue: 0,0:01:43.74,0:01:47.48,Default,,0000,0000,0000,,雖然季節變化對已知病毒嘅影響大
Dialogue: 0,0:01:47.48,0:01:50.39,Default,,0000,0000,0000,,但由於冇人對呢種新病毒有免疫
Dialogue: 0,0:01:50.39,0:01:55.39,Default,,0000,0000,0000,,所以佢唔需要理想條件\N就可以感染好多潛在宿主
Dialogue: 0,0:01:55.39,0:02:00.03,Default,,0000,0000,0000,,喺人體之中，蛋白刺突嵌入\N宿主細胞，並同佢結合
Dialogue: 0,0:02:00.03,0:02:02.90,Default,,0000,0000,0000,,因此，病毒可以綁架\N成個宿主細胞機制
Dialogue: 0,0:02:02.90,0:02:05.54,Default,,0000,0000,0000,,要挾宿主細胞複製病毒嘅基因
Dialogue: 0,0:02:05.54,0:02:08.62,Default,,0000,0000,0000,,冠狀病毒將佢哋嘅基因儲存喺 RNA
Dialogue: 0,0:02:08.62,0:02:12.68,Default,,0000,0000,0000,,所有病毒都可以分為 RNA 病毒\N或者 DNA 病毒
Dialogue: 0,0:02:12.68,0:02:15.70,Default,,0000,0000,0000,,RNA 病毒一般都比較細\N攜帶較少嘅基因
Dialogue: 0,0:02:15.70,0:02:20.26,Default,,0000,0000,0000,,即佢哋可以感染好多宿主\N仲可以喺宿主體內快速複製
Dialogue: 0,0:02:20.26,0:02:24.46,Default,,0000,0000,0000,,一般嚟講，RNA 病毒\N都係冇校對機制嘅
Dialogue: 0,0:02:24.46,0:02:27.06,Default,,0000,0000,0000,,而 DNA 病毒就有
Dialogue: 0,0:02:27.06,0:02:29.36,Default,,0000,0000,0000,,所以當一個 RNA 病毒複製緊
Dialogue: 0,0:02:29.36,0:02:33.40,Default,,0000,0000,0000,,基因變異就更頻繁噉發生
Dialogue: 0,0:02:33.40,0:02:37.34,Default,,0000,0000,0000,,呢啲變異好多都係冇用\N甚至係有害
Dialogue: 0,0:02:37.34,0:02:40.47,Default,,0000,0000,0000,,但有啲變異可以令病毒\N更加適應到某啲環境
Dialogue: 0,0:02:40.47,0:02:42.96,Default,,0000,0000,0000,,譬如係一種新嘅宿主物種
Dialogue: 0,0:02:42.96,0:02:47.43,Default,,0000,0000,0000,,當一種病毒從動物傳播到人類身上\N流行病就會發生啦
Dialogue: 0,0:02:47.43,0:02:55.88,Default,,0000,0000,0000,,引發伊波拉、寨卡、沙士\N同埋新冠肺炎嘅 RNA 病毒都係噉
Dialogue: 0,0:02:55.88,0:02:58.74,Default,,0000,0000,0000,,噉進入人體之後，病毒依然會變異
Dialogue: 0,0:02:58.74,0:03:00.100,Default,,0000,0000,0000,,雖然唔會通常演變到成為一種新嘅病毒
Dialogue: 0,0:03:00.100,0:03:05.32,Default,,0000,0000,0000,,但都做到啲基因變異出嚟
Dialogue: 0,0:03:05.32,0:03:09.98,Default,,0000,0000,0000,,冠狀病毒同大部分 RNA 病毒\N有幾個關鍵嘅區別
Dialogue: 0,0:03:09.98,0:03:13.33,Default,,0000,0000,0000,,佢哋比較大隻\N即係有最多基因
Dialogue: 0,0:03:13.33,0:03:16.93,Default,,0000,0000,0000,,噉就更易令有害變異發生
Dialogue: 0,0:03:16.93,0:03:21.07,Default,,0000,0000,0000,,為咗降低呢種風險\N冠狀病毒有一種獨特嘅特點
Dialogue: 0,0:03:21.07,0:03:25.07,Default,,0000,0000,0000,,佢含有一種酵素，專門\N負責檢查、糾正複製錯誤
Dialogue: 0,0:03:25.07,0:03:27.76,Default,,0000,0000,0000,,咁就令到冠狀病毒更加穩定
Dialogue: 0,0:03:27.76,0:03:31.37,Default,,0000,0000,0000,,令到佢比其他 RNA 病毒變異得更慢
Dialogue: 0,0:03:31.37,0:03:33.64,Default,,0000,0000,0000,,雖然聽起嚟好恐怖
Dialogue: 0,0:03:33.64,0:03:36.62,Default,,0000,0000,0000,,但係講到要瓦解冠狀病毒
Dialogue: 0,0:03:36.62,0:03:38.86,Default,,0000,0000,0000,,變異得慢係好事嚟
Dialogue: 0,0:03:38.86,0:03:42.22,Default,,0000,0000,0000,,因為當我哋感染病菌之後\N我哋嘅免疫系統可以識別病菌
Dialogue: 0,0:03:42.22,0:03:45.31,Default,,0000,0000,0000,,而當我哋再次感染病菌時\N就可以更快消滅病菌
Dialogue: 0,0:03:45.31,0:03:47.40,Default,,0000,0000,0000,,噉佢哋就唔會再搞到我哋病
Dialogue: 0,0:03:47.40,0:03:51.14,Default,,0000,0000,0000,,但係病毒變異可以令我哋嘅免疫系統\N冇咁容易識別到病毒
Dialogue: 0,0:03:51.14,0:03:53.72,Default,,0000,0000,0000,,噉擊退病毒就會難啲
Dialogue: 0,0:03:53.72,0:03:57.62,Default,,0000,0000,0000,,而病毒變異會令抗病毒藥物\N同疫苗，變得冇咁有效
Dialogue: 0,0:03:57.62,0:04:01.48,Default,,0000,0000,0000,,因為藥物同疫苗\N係專門針對某種病毒嘅
Dialogue: 0,0:04:01.48,0:04:04.42,Default,,0000,0000,0000,,噉就係點解我哋每年\N都要重新打一次流感疫苗
Dialogue: 0,0:04:04.42,0:04:09.25,Default,,0000,0000,0000,,因為流感病毒變異得好快\N新嘅病毒不斷出現
Dialogue: 0,0:04:09.25,0:04:11.94,Default,,0000,0000,0000,,冠狀病毒較慢嘅變異速率
Dialogue: 0,0:04:11.94,0:04:14.68,Default,,0000,0000,0000,,意味著我哋嘅免疫系統\N同埋藥物、疫苗
Dialogue: 0,0:04:14.68,0:04:18.17,Default,,0000,0000,0000,,喺感染之後嘅一段長時間\N都仲可以識別到呢啲病毒
Dialogue: 0,0:04:18.17,0:04:21.03,Default,,0000,0000,0000,,噉就可以更好咁保障我哋
Dialogue: 0,0:04:21.03,0:04:25.71,Default,,0000,0000,0000,,目前，我哋依然都未知我哋嘅身體\N可以對唔同嘅冠狀病毒免疫幾耐
Dialogue: 0,0:04:25.71,0:04:29.61,Default,,0000,0000,0000,,面對任何冠狀病毒，永遠都\N唔會有一種肯定嘅療法或疫苗
Dialogue: 0,0:04:29.61,0:04:32.33,Default,,0000,0000,0000,,雖然科學家開始研發 \N針對 SARS 同 MERS 嘅治療
Dialogue: 0,0:04:32.33,0:04:36.09,Default,,0000,0000,0000,,但我哋都仲未重點研究感冒治療
Dialogue: 0,0:04:36.09,0:04:40.37,Default,,0000,0000,0000,,喺療法嘅臨床實驗完成之前\N疫情就已經結束啦
Dialogue: 0,0:04:40.37,0:04:43.49,Default,,0000,0000,0000,,有科學家話，鑒於我哋一直喺度\N入侵其他動物嘅棲息地
Dialogue: 0,0:04:43.49,0:04:48.62,Default,,0000,0000,0000,,新嘅冠狀病毒\N係無可避免會傳播到人身上
Dialogue: 0,0:04:48.62,0:04:53.55,Default,,0000,0000,0000,,但如果我哋要探索未知\N都唔一定次次要咁大劑嘅