大規模なSARS-CoV-2デルタ変異の発生におけるワクチン接種者からの感染
Katherine J Siddle1, Lydia A Krasilnikova2, Gage K Moreno1
1Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA.
Cell
|January 20, 2022
まとめ
2021年のProvincetownのCOVID-19の流行は,主にワクチン接種者間で,ワクチン接種者間でデルタ型が広がっていることを示した. 高いワクチン接種率と公衆衛生の努力により 広範な影響は制限された.
科学分野:
- 流行病学について
- ウイルスゲノム学
- 公衆衛生
背景:
- 2021年7月,マサチューセッツ州プロビンスタウンで重大なCOVID-19の流行が発生し,主にワクチン接種を受けた個人に影響を与えた.
- このアウトブレイクは,高度にワクチン接種された集団におけるSARS-CoV-2の感染と伝染の動態に関する重大な疑問を提起した.
研究 の 目的:
- プロビンスタウンのCOVID-19の発生のゲノムと疫学的特徴を調査する.
- ワクチンを接種した人の間で感染するデルタ変異の役割を理解する.
- 疫病の拡大を制限する要因を評価する.
主な方法:
- ウイルスのゲノム配列を統合し,467人の疫学データで,アウトブレイクに関連した症例の40%を占めた.
- 感染経路を追跡するために ウイルスのサンプルと 遺伝的関連性を分析した
- ワクチン接種状況と暴露歴に関する疫学データと相関するゲノム調査結果
主要な成果:
- 分析された症例の99%はデルタ変種による.
- ゲノムデータと疫学データは,完全にワクチン接種した個人間でSARS-CoV-2 デルタ感染の複数の事例を示した.
- 疫病は少なくとも40の感染源から発生し,症例の83%は1つの主要な感染源に関連しています.
結論:
- この研究は,デルタ変種がワクチン接種した個人間で感染することを確認しています.
- 人口の高いワクチン接種率と効果的な公衆衛生の介入は,アウトブレイクのより広範な影響を軽減するのに不可欠でした.
- 発見は,SARS-CoV-2の感染管理における継続的な監視と予防接種戦略の重要性を強調しています.
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