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![Omicron亞變異株 XBB傳播快速](https://1a-1791.com/video/s8/6/S/1/C/B/S1CBh.OvCc.jpg)
Omicron亞變異株 XBB傳播快速
2 years ago
7
2022年12月24日
COVID-19(2019冠狀病毒疾病)Omicron病毒株的高傳染性亞型變異株XBB病例,已激增到佔全美約18%,在美國東北部佔50%以上,而此時正是上千萬美國人逢假日外出的季節。
美國疾病管制暨預防中心(CDC)12月23日通報,在截至12月24日為止的一週,估計XBB病例已占全美18.3%,較前一週的11.2%增加。XBB是Omicron亞型變異株BA.2的分支。
美國傳染病學專家佛奇(Anthony Fauci)11月間表示,以最初變異株和亞型變異株BA.4、BA.5為預防目標的更新版疫苗追加劑,對XBB仍具「一些防護力,但沒有最佳防護效果」。
BA.5病例如今僅屬少數,已被分支BQ.1和BQ.1.1超越。BQ.1和BQ.1.1目前仍是主流亞型變異株,但相關病例也在減少中。
在XBB病例增加前,白宮疫情應對協調官吉哈(Ashish Jha)上週曾籲請美國民眾,接種流感疫苗以及COVID-19疫苗追加劑。他指出,在年末假期來臨之前,全美大約90%地區的COVID-19病例已增加。
亞洲一些地區已因XBB傳播而致病例不斷增加,包括新加坡。儘管有些專家表示,XBB傳染性較強,但並未使重症住院病例增加。
美國疾管中心表示,BQ.1.1和BQ.1目前可望佔全美病例63.1%,相較下,一週前佔64.6%。
更多其他話題內容:www.healthtodaynyc.com
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