Relationship between clinical symptom profiles and COVID-19 infection status during delta-dominant period versus omicron-dominant period – analysis of real-world data collected in Hiroshima Prefecture, Japan

COVID-19, caused by the severe acute respiratory syndrome coronavirus (SARS-CoV-2) spread rapidly around the world after December 2019, when the first case was diagnosed in Wuhan City, Hubei Province, China. As of 5 March 2023, over 759 million confirmed cases and over 6.8 million deaths have been reported globally [1]. In Japan, the first domestic case of COVID-19 transmission was reported on January 16, 2020 [2], and the pandemic has now entered its fourth year. Throughout this time, governments around the world have taken various preventative measures in response to the pandemic, from mask wearing and social distancing to border closures and lockdowns [3].
Source: International Journal of Infectious Diseases - Category: Infectious Diseases Authors: Source Type: research