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Backインフルエンザが過去2番目の早さで全国的な流行シーズン入り
インフルエンザが過去2番目の早さで全国的な流行シーズン入り
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時事通信4 days agoHealth2 min readJapanView translation

インフルエンザが過去2番目の早さで全国的な流行シーズン入り

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インフルエンザが全国的に流行シーズンに入り、過去2番目の早さとなった。新学期開始による児童生徒の接触機会増加が懸念され、厚生労働省は手洗いやせきエチケットなど基本的な感染対策を呼びかけている。

AI-generated summary

Why It Matters

インフルエンザの流行は通常、例年9月下旬頃から始まるが、今年は8月中旬に流行入りの目安となる1医療機関当たり1.11人を上回り、過去2番目の早さとなった。昨年は9月下旬だった。

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インフルエンザが過去2番目の早さで全国的な流行シーズンに入った。新学期が始まって児童生徒の接触機会が増えることから、専門家は今後の動向を注視。厚生労働省は、手洗いやせきエチケットなど基本的な感染対策を呼び掛けている。

高用量ワクチン、今秋導入見送り 高齢者インフル定期接種―厚労省

国立健康危機管理研究機構(JIHS)によると、全国の定点医療機関から報告された患者数は6月下旬から増加傾向に。8月17~23日は1医療機関当たり1.11人で、流行入りの目安となる「1人」を上回った。

感染症法に基づく現在の調査が始まった1999年以降では、2009年の8月中旬に次ぐ早さ(1年を通して流行した23年を除く)。昨年は9月下旬だった。

海外でも流行している地域はあるが、主流となるウイルスのタイプは各地で異なる。国内では現在、09年に世界的な流行を引き起こし、その後は季節性インフルエンザとして定着したH1N1型が中心となっている。

ただ、流行入りが早まった理由は分かっていない。海外からのウイルス流入や人の移動・接触機会の増加、H1N1型の免疫が十分でない人が多いなど複数の要因が考えられる。今後の動向について、JIHSの神垣太郎・感染症サーベイランス研究部部長は、「新学期が始まると人の動きが変わる。9月以降のデータを見ていく必要がある」と話す。

厚労省によると、今季のワクチンは早ければ9月第2週から医療機関へ納品が始まる見通し。注射型のほか、2~18歳を対象に鼻からスプレーするタイプもある。定期接種は65歳以上などが対象だが、子どもの接種費用を助成する自治体もある。

What to Watch

AI outlook — possibilities, not facts

  • 9月以降のデータを見て、今後の感染動向を注視する必要がある

    Possible · Within weeks

Open Questions

  • 流行入りが早まった具体的な理由は何か
  • 今後の感染拡大の規模とピーク時期はどのようになるか
  • H1N1型への免疫が十分でない人の割合はどの程度か

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This article was originally published by 時事通信.

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