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新たに出現した重症急性呼吸器症候群コロナウイルス2（SARS-CoV-2）オミクロン亜系統には、BA.2由来のBA.2.75.2、BA.5由来のBQ.1.1とXBB.1が含まれており、ワクチンの有効性に影響を与える可能性のあるスパイクタンパク質の変異の数がさらに増加・集積している。

新型コロナウイルスのmRNA（メッセンジャーRNA）ワクチンの改良が進んでいる。米国と欧州で2022年9月に入ってブースター接種が始まった新しいワクチンは、いま感染が広がっているオミクロン株に対応したものだ。この改良ワクチンについて保健当局は、19 ...

Preliminary data from three separate research teams suggest the latest anxiety-inducing COVID-19 variant isn’t quite the threat many had feared. BA.2.86 — or what some armchair epidemiologists have ...

The administration of COVID-19 vaccine booster shots has begun in Japan. It is hoped that the shots will help restore the protection provided by original vaccinations, which weakens over time. People ...

The booster shot, named AZD2816, will be administered to individuals who have previously been fully vaccinated with two doses of AstraZeneca vaccine/Vaxzervia or an mRNA vaccine, at least three months ...

Pfizer and its partner BioNTech announced on Thursday that the companies are developing a specially formulated COVID-19 booster shot to fight against the highly contagious Delta variant. In a ...