Ontology highlight
ABSTRACT: Objective
On 7 April 2020, the Japanese government declared a state of emergency in response to the novel coronavirus outbreak. To estimate the impact of the declaration on regional cities with low numbers of COVID-19 cases, large-scale surveillance to capture the current epidemiological situation of COVID-19 was urgently conducted in this study.Design
Cohort study.Setting
Social networking service (SNS)-based online survey conducted in five prefectures of Japan: Tottori, Kagawa, Shimane, Tokushima and Okayama.Participants
127?121 participants from the five prefectures surveyed between 24 March and 5 May 2020.Interventions
An SNS-based healthcare system named COOPERA (COvid-19: Operation for Personalized Empowerment to Render smart prevention And care seeking) was launched. It asks questions regarding postcode, personal information, preventive actions, and current and past symptoms related to COVID-19.Primary and secondary outcome measures
Empirical Bayes estimates of age-sex-standardised incidence rate (EBSIR) of symptoms and the spatial correlation between the number of those who reported having symptoms and the number of COVID-19 cases were examined to identify the geographical distribution of symptoms in the five prefectures.Results
97.8% of participants had no subjective symptoms. We identified several geographical clusters of fever with significant spatial correlation (r=0.67) with the number of confirmed COVID-19 cases, especially in the urban centres of prefectural capital cities.Conclusions
Given that there are still several high-risk areas measured by EBSIR, careful discussion on which areas should be reopened at the end of the state of emergency is urgently required using real-time SNS system to monitor the nationwide epidemic.
SUBMITTER: Yoneoka D
PROVIDER: S-EPMC7886666 | biostudies-literature | 2021 Feb
REPOSITORIES: biostudies-literature
Yoneoka Daisuke D Shi Shoi S Nomura Shuhei S Tanoue Yuta Y Kawashima Takayuki T Eguchi Akifumi A Matsuura Kentaro K Makiyama Koji K Uryu Shinya S Ejima Keisuke K Sakamoto Haruka H Taniguchi Toshibumi T Kunishima Hiroyuki H Gilmour Stuart S Nishiura Hiroshi H Miyata Hiroaki H
BMJ open 20210215 2
<h4>Objective</h4>On 7 April 2020, the Japanese government declared a state of emergency in response to the novel coronavirus outbreak. To estimate the impact of the declaration on regional cities with low numbers of COVID-19 cases, large-scale surveillance to capture the current epidemiological situation of COVID-19 was urgently conducted in this study.<h4>Design</h4>Cohort study.<h4>Setting</h4>Social networking service (SNS)-based online survey conducted in five prefectures of Japan: Tottori, ...[more]