Clinical manifestations of adult patients requiring influenza-associated hospitalization in the pre-, during, and post-COVID-19 pandemic periods: An internet-based, prospective, multicenter, cohort study in Japan.

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Title: Clinical manifestations of adult patients requiring influenza-associated hospitalization in the pre-, during, and post-COVID-19 pandemic periods: An internet-based, prospective, multicenter, cohort study in Japan.
Authors: Seki M; Department of Infectious Diseases and Infection Control, Saitama Medical University International Medical Center, 1-7-1 Yamane, Hidaka City, Saitama 350-1398, Japan. Electronic address: sekimm@saitama-med.ac.jp., Ito A; Department of Respiratory Medicine, Ohara Healthcare Foundation, Kurashiki Central Hospital, 1-1-1, Kurashiki, Okayama 710-8602, Japan., Oya Y; Research Administration Center, Saitama Medical University, 38 Morohongo, Moroyama-machi, Saitama 350-0495, Japan., Shiko Y; Department of Biostatistics, Graduate School of Medicine, Saitama Medical University, 38 Morohongo, Moroyama-machi, Saitama 350-0495, Japan., Osawa M; Department of Biostatistics, Graduate School of Medicine, Saitama Medical University, 38 Morohongo, Moroyama-machi, Saitama 350-0495, Japan., Tateda K; Department of Microbiology and Infectious Diseases, Toho University, 5-21-6, Omorinishi, Ota-ku, Tokyo 143-8540, Japan., Fujita J; Respiratory Medicine, Ohama Dai-ichi Hospital, 1000 Ameku, Naha City, Okinawa 900-0005, Japan., Komiya K; Department of Respiratory Medicine and Infectious Diseases, Oita University Hospital, 1-1 Idaigaoka, Hazama, Yufu City, Oita 879-5593, Japan., Kawana A; Division of Infectious Diseases and Respiratory Medicine, National Defense Medical College, Namiki, Tokorozawa, Saitama 359-8513, Japan., Izumikawa K; Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1, Sakamoto, Nagasaki 852-8501, Japan., Kikuchi T; Department of Respiratory Medicine and Infectious Diseases, Niigata University Graduate School of Medical and Dental Sciences, 751, Ichibancho, Asahimachi-dori, Chuo-ku, Niigata 951-8510, Japan., Ohmagari N; Disease Control and Prevention Center, National Center for Global Health and Medicine, 1-21-1, Toyama, Shinjuku-ku, Tokyo 162-8655, Japan., Yamada M; Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, 1-1, Seiryocho, Aoba-ku, Sendai, Miyagi 980-8574, Japan., Maruyama T; Department of Internal Medicine, Mie Prefectural Ichishi Hospital, 616 Minamiieki, Hakusan, Tsu, Mie 515-3133, Japan., Takazono T; Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1, Sakamoto, Nagasaki 852-8501, Japan., Miki M; Department of Pulmonary and Respiratory Medicine, Japanese Red Cross Sendai Hospital, 2-43-3, Yamamotocho, Yagi, Taihaku-ku, Sendai 982-8501, Japan., Miyazaki Y; Department of Chemotherapy and Mycoses, National Institute of Infectious Diseases, 1-23-1, Toyama, Shinjuku-ku, Tokyo 162-8640, Japan., Yamazaki Y; Division of Infectious Diseases, Shinsyu Medical Center, 1332, Suzaka, Nagano 382-0091, Japan., Kakeya H; Department of Infectious Control Science, Osaka City University Graduate School of Medicine, 1-4-3, Asahimachi, Abeno-ku, Osaka 545-8585, Japan., Hayashi Y; Department of Respiratory Medicine, National Hospital Organization Higashinagoya National Hospital, 5-101, Umemorizaka, Meito-ku, Nagoya, Aichi 465-8620, Japan., Nagai H; Department of Infectious Diseases, National Hospital Organization, Tokyo National Hospital, 3-1-1, Takeoka, Kiyose, Tokyo 204-8585, Japan., Ishida T; Department of Respiratory Medicine, Ohara Healthcare Foundation, Kurashiki Central Hospital, 1-1-1, Kurashiki, Okayama 710-8602, Japan.
Source: Respiratory investigation [Respir Investig] 2026 May 12; Vol. 64 (4), pp. 101444. Date of Electronic Publication: 2026 May 12.
Publication Type: Journal Article
Journal Info: Publisher: Elsevier Country of Publication: Netherlands NLM ID: 101581124 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 2212-5353 (Electronic) Linking ISSN: 22125345 NLM ISO Abbreviation: Respir Investig Subsets: MEDLINE
Database: MEDLINE Ultimate
Description
ISSN:2212-5353
DOI:10.1016/j.resinv.2026.101444