Clinical characteristics of the first three waves of hospitalised patients with COVID-19 in Japan prior to the widespread use of vaccination: a nationwide observational study

• Main Authors: Nobuaki Matsunaga (Author), Kayoko Hayakawa (Author), Yusuke Asai (Author), Shinya Tsuzuki (Author), Mari Terada (Author), Setsuko Suzuki (Author), Hiroshi Ohtsu (Author), Koji Kitajima (Author), Ako Toyoda (Author), Kumiko Suzuki (Author), Michiyo Suzuki (Author), Sho Saito (Author), Yukari Uemura (Author), Taro Shibata (Author), Masashi Kondo (Author), Fukumi Nakamura-Uchiyama (Author), Kazuhisa Yokota (Author), Fumitake Saito (Author), Kazuo Izumi (Author), Wataru Sugiura (Author), Norio Ohmagari (Author)
• Format: Book
• Published: Elsevier, 2022-05-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

Summary: Background: Before widespread coronavirus disease (COVID-19) vaccinations, Japan experienced three COVID-19 epidemic waves. This study aimed to evaluate the characteristics of hospitalised COVID-19 patients and reveal temporal changes. Methods: This study included 33,554 hospitalised patien...