Takeshi Arashiro, Maki Miwa, Hidenori Nakagawa, Junpei Takamatsu, Kunihiro Oba, Satoshi Fujimi, Hitoshi Kikuchi, Takamasa Iwasawa, Fumiko Kanbe, Keisuke Oyama, Masayuki Kanai, Yoshitaka Ogata, Takanori Asakura, Takahiro Asami, Keiko Mizuno, Manabu Sugita, Torahiko Jinta, Yusuke Nishida, Hideaki Kato, Kazuaki Atagi, Taiki Higaki, Yoshio Nakano, Takeya Tsutsumi, Kent Doi, Shu Okugawa, Akihiro Ueda, Akira Nakamura, Toru Yoshida, Kaoru Shimada-Sammori, Keiki Shimizu, Yasuo Fujita, Yasumi Okochi, Kentaro Tochitani, Asuka Nakanishi, Hiroshi Rinka, Daisuke Taniyama, Asase Yamaguchi, Toshio Uchikura, Maiko Matsunaga, Hiromi Aono, Masanari Hamaguchi, Kentaro Motoda, Sohei Nakayama, Kei Yamamoto, Hideaki Oka, Katsushi Tanaka, Takeshi Inoue, Mieko Kobayashi, Shigeki Fujitani, Maki Tsukahara, Saki Takeda, Ashley Stucky, Tadaki Suzuki, Chris Smith, Martin Hibberd, Koya Ariyoshi, Yuji Fujino, Yuzo Arima, Shinhiro Takeda, Satoru Hashimoto, Motoi Suzuki
INTRODUCTION: Since the SARS-CoV-2 Omicron variant became dominant, assessing COVID-19 vaccine effectiveness (VE) against severe disease using hospitalization as an outcome became more challenging due to incidental infections via admission screening and variable admission criteria, resulting in a wide range of estimates. To address this, the World Health Organization (WHO) guidance recommends the use of outcomes that are more specific to severe pneumonia such as oxygen use and mechanical ventilation...
January 25, 2024: Vaccine