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COVID-19 バイバルントワクチン接種後の脳卒中リスク
Yun Lu1, Kathryn Matuska2, Gita Nadimpalli2
1Center for Biologics Evaluation and Research, US Food and Drug Administration, Silver Spring, Maryland.
JAMA
|March 19, 2024
まとめ
Pfizer-BioNTechまたはModernaのCOVID-19双価ワクチンを接種した高齢者の脳卒中リスクは増加していない. しかし,インフルエンザワクチンの併用で脳卒中のリスクが認められた.
科学分野:
- 免疫学
- 流行病学
- 公衆衛生
背景:
- 規制機関は,ファイザー・バイオンテックによる二価のCOVID-19ワクチンの後,高齢者の血栓性脳卒中の潜在的な安全性に関する懸念を指摘した.
- これにより,COVID-19の双価ワクチンに関連する潜在的脳卒中リスクに関する調査が行われました.
研究 の 目的:
- COVID-19 双価ワクチン接種後の脳卒中のリスクを評価する.
- COVID-19 双価ワクチンとインフルエンザワクチンを同日に投与した後の脳卒中リスクを評価する.
- インフルエンザワクチンの単独接種後の脳卒中リスクを調査する.
主な方法:
- 65歳以上のメディケア受給者を対象に,自己制御のケースシリーズ研究が行われました.
- この研究では,2022年8月から2023年2月の間にCOVID-19の双価ワクチンを接種した530万人以上の個人を対象とした.
- 43〜90日間の対照群と比較して,ワクチン接種後の1〜21日および22〜42日間の間の脳卒中事件を分析した.
主要な成果:
- COVID-19 双価ワクチンのいずれかのブランドを投与した後に脳卒中のリスクが統計的に有意に増加することは観察されなかった.
- Pfizer- BioNTechの双価ワクチンと,インフルエンザワクチンと併用された非出血性脳卒中との間には,統計的に有意な関連性が見られた.
- インフルエンザワクチンと併用された場合,Modernaの双価ワクチンと一時的な血栓性発作との間にも統計的に有意な関連性が見られた.
結論:
- この研究では,65歳以上のメディケアの受給者において,COVID-19の双価ワクチン接種後に脳卒中のリスクが上昇した証拠は見つかりませんでした.
- COVID-19の双価ワクチンと高用量または補助剤付きインフルエンザワクチンの併用投与は,脳卒中の結果と統計的に有意な関連性を示した.
- これらの発見は,高齢者の併用戦略を慎重に検討することを示唆しています.
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