Global Journal of Epidemiology and Infectious Disease <p><strong><em>Global Journal of Epidemiology and Infectious Disease</em> </strong>is an international journal dedicated to the latest advancements in Epidemiology. The goal of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of Epidemiology and Infectious Disease.</p> en-US (Robert Williams) (Robert Williams) Sat, 06 Apr 2024 13:39:20 +0000 OJS 60 Clinical differences between hospitalized patients with COVID-19-related pneumonia and those with influenza-related pneumonia during the omicron variant surge <p><strong><em>Background:</em></strong> COVID-19-related pneumonia was initially rare, though influenza-related pneumonia is well known as a severe complication of influenza. However, COVID-19-related pneumonia may be increasing since the omicron variant of COVID-19 appeared. <strong><em>Methods:</em></strong> The clinical differences between COVID-19-related and influenza-related pneumonia patients were retrospectively investigated in patients hospitalized from January 2022 to December 2023. <strong><em>Results: </em></strong>COVID-19-related and influenza-related pneumonias were found in 46 of 285 (15.8%) and 6 of 12 (50.0%) patients, respectively (p&lt;0.001). Their mean ages were 75.5 (45-93) years and 53.8 (19-73) years in COVID-19-related and influenza-related pneumonia cases, respectively (p=0.002). Aspiration pneumonia was more common in COVID-19-related pneumonia (28/46=60.9%) than in influenza-related pneumonia patients, and it was treated by sulbactam/ampicillin (31/46=67.4%). The influenza-related pneumonia patients were more often infected in the work place (2/6=33.3%) and not vaccinated (4/6=66.7%), compared with COVID-19-related patients. Death occurred in 7 of 46 (15.2%) COVID-19 patients, but none of 6 influenza-infected patients died. <strong><em>Conclusions:</em></strong> These data suggest that COVID-19-related pneumonia presented as aspiration pneumonia in older patients, although influenza-related pneumonia was more common in younger and non-vaccinated patients and might be associated with immune mechanisms during the omicron variant surge era.</p> Masafumi Seki, Chie Kubosawa, Makoto Ono, Fumitaka Kamoshita, Atsuko Shimizu, Haruka Karaushi, Noriyuki Watanabe, Kotaro Mitsutake Copyright (c) 2024 Global Journal of Epidemiology and Infectious Disease Sat, 06 Apr 2024 00:00:00 +0000