著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Mitsushima Shingo and Horiguchi Hiromasa and Taniguchi Kiyosu,Alpha and Delta variants and vaccination effectiveness against severity in COVID-19 inpatients based on medical claims in Japan,GHM Open,2436293X,国立研究開発法人 国立国際医療研究センター,2023-08-27,3,1,28-36,https://cir.nii.ac.jp/crid/1390297282960572032,https://doi.org/10.35772/ghmo.2023.01005