インドの2つの州におけるCOVID-19の流行病学と伝播動態
Ramanan Laxminarayan1,2,3, Brian Wahl3,4, Shankar Reddy Dudala5
1Center for Disease Dynamics, Economics and Policy, New Delhi, India.
Science (New York, N.Y.)
|November 6, 2020
まとめ
インドにおける重症急性呼吸器症候群コロナウイルス2型 (SARS-CoV-2) の感染と死亡率は,若者および同年齢の接触者における感染リスクが高いことを示しています. 低資源国からのより多くのデータは,効果的なCOVID-19管理に不可欠です.
科学分野:
- 流行病学
- 感染症
- 公衆衛生
背景:
- 2019年新型コロナウイルス病 (COVID-19) の症例の大半は,資源が少ない国々で発生していますが,これらの環境における病気の流行病学は十分に理解されていません.
- 重症急性呼吸器症候群コロナウイルス2 (SARS-CoV-2) の感染と死亡率を理解することは,世界的な公衆衛生戦略にとって極めて重要です.
研究 の 目的:
- SARS-CoV-2の感染経路と死亡率を,発生頻度が高く,資源が少ない環境で調査する.
- 異なる年齢層と接触者の感染確率と死亡率を分析する.
主な方法:
- インドのタミルナードゥ州とアンドラ・プレデシュ州で確認された84,965人のCOVID-19感染者に接触した575,071人のデータを遡及的に分析した.
- 接触リスクと年齢に基づく感染確率の計算
- 様々な年齢層における症例死亡率の決定
主要な成果:
- 感染確率は4. 7% (低リスク) から10. 7% (高リスク) の接触者でした.
- 同じ年齢の接触者は感染のリスクが最も高かった.
- 死亡率は0. 05% (5~17歳) から16. 6% (85歳以上) であった.
- COVID-19の症例と死亡は,人口統計の調整後でも,高所得国と比較して若い集団に集中していた.
結論:
- 低所得国におけるCOVID-19の流行病学は,高所得国とは著しく異なっており,若年層が不釣り合いに影響を受けている.
- 資源が少ない国からのプライマリデータが緊急に必要であり,標的と効果的な制御措置を提示する.
- 発見は,パンデミック対策において,年齢特有の伝播動態とリスク要因を考慮する重要性を強調しています.
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