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Assessing the regional impact of Japan's COVID-19 state of emergency declaration: a population-level observational study using social networking services.


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

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Publications

Assessing the regional impact of Japan's COVID-19 state of emergency declaration: a population-level observational study using social networking services.

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]

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