The impact of declaring the state of emergency on human mobility during COVID-19 pandemic in Japan

Nakamoto, Daisuke; Nojiri, Shuko; Taguchi, Chie; Kawakami, Yuta; Miyazawa, Satoshi; Kuroki, Manabu; Nishizaki, Yuji

doi:10.1016/j.cegh.2022.101149

Cited by 6 publications

(3 citation statements)

References 25 publications

(36 reference statements)

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“…We have revealed that human mobility and the infection growth rate were highly associated and that policies for human mobility influenced the IAI 12,13 . The state of emergency during the first wave had a great impact on reducing the IAI, and the Go To campaign after the second wave had an impact on human mobility.…”

Section: Discussionmentioning

confidence: 99%

Novel indicator for the spread of new coronavirus disease 2019 and its association with human mobility in Japan

Kawakami

Nojiri

Nakamoto

et al. 2023

Sci Rep

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The Japanese government adopted policies to control human mobility in 2020 to prevent the spread of severe acute respiratory syndrome coronavirus 2, which causes coronavirus disease 2019 (COVID-19). The present study examined the impact of human mobility on COVID-19 cases at the prefectural level in Japan by devising an indicator to have a relationship between the number of infected people and on human mobility. We calculated origin–destination travel mobility within prefectures in Japan from March 1st to December 31st, 2020, using mobile phone data. A cross-correlation function (CCF) was used to examine the relationship between human mobility and a COVID-19 infection acceleration indicator (IAI), which represents the rate of change in the speed of COVID-19 infection. The CCF of intraprefectural human mobility and the IAI in Tokyo showed a maximum value of 0.440 at lag day 12, and the IAI could be used as an indicator to predict COVID-19 cases. Therefore, the IAI and human mobility during the COVID-19 pandemic were useful for predicting infection status. The number of COVID-19 cases was associated with human mobility at the prefectural level in Japan in 2020. Controlling human mobility could help control infectious diseases in a pandemic, especially prior to starting vaccination.

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Section: Discussionmentioning

confidence: 99%

Novel indicator for the spread of new coronavirus disease 2019 and its association with human mobility in Japan

Kawakami

Nojiri

Nakamoto

et al. 2023

Sci Rep

Self Cite

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“…We defined March 2020 as the point at which influenza dynamics changed due to the implementation of travel restrictions and the first emergency declaration, which led to the widespread adoption of nonpharmaceutical interventions against COVID‐19 12 . The pre‐COVID era was defined as the period from April 2018 to March 2020, while the COVID‐19 pandemic era was defined as the period from April 2020 to March 2023, allowing for a comparison of influenza dynamics between periods.…”

Section: Methodsmentioning

confidence: 99%

Surveillance of seasonal influenza viruses during the COVID‐19 pandemic in Tokyo, Japan, 2018–2023, a single‐center study

Takahashi,

Nagamatsu,

Yamada

et al. 2024

Influenza Resp Viruses

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IntroductionCOVID‐19 pandemic led to significant reductions in influenza detection worldwide, fueling debates on whether influenza truly ceased circulating in communities. The number of influenza cases decreased significantly in Japan, raising concerns about the potential risk of decreased immunity to influenza in the population. Our single‐center study aimed to investigate influenza trends before and during the COVID‐19 pandemic in Tokyo, Japan.Materials and MethodsThis cross‐sectional study included patients of all ages who visited Tokyo Shinagawa Hospital between April 1, 2018, and March 31, 2023. Influenza and COVID‐19 tests were conducted using Quick Navi‐Flu2 and polymerase chain reaction (PCR). We analyzed data from before and during the COVID‐19 epidemic, based on patient background, hospitalization, and deaths, collected from medical records.ResultsA total of 12 577 influenza tests were conducted, with approximately 100 tests consistently performed each month even in the influenza off‐season. Throughout the observation period, 962 positive cases were identified. However, no cases were observed for 27 months between March 2020 and November 2022. Influenza A cases were reobserved in December 2022, followed by influenza B cases in March 2023, similar to the influenza incidence reports from Tokyo. The positivity rate during the 2022–2023 winter season was lower than before the COVID‐19 epidemic and decreased in elderly patients, with no hospitalizations or deaths observed.ConclusionThis single‐center study provided actual trend data for influenza patients before and during COVID‐19 outbreaks in Tokyo, which could offer insights into the potential impact and likelihood of influenza virus infection in Japan.

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“…3 Semi-emergency coronavirus measures were also in effect from 2021/4/5 to 2021/9/30 and from 2022/1/9 to 2022/3/21. 3 During the periods, people in Japan were requested to refrain from unnecessary and nonurgent gatherings and outings, 4,5 and there were reports of elective surgical procedures being canceled and a reluctance to seek medical consultations, 6,7 which can be regarded as a voluntary-based lockdown. 8 The increased proportions of deaths due to senility, heart disease, and aspiration pneumonia, conditions that are more likely to occur in elderly individuals with decreased physical strength, 2 cannot be overlooked in light of the impact of the state of emergency declarations.…”

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confidence: 99%

All‐cause mortality and Japan's early countermeasures: Authors' reply

Kaneda,

Takahashi

2024

Health Science Reports

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We appreciate the opportunity to respond to the points raised by Søren Roest Korsgaard regarding our paper on the assessment of Japan's early response to the COVID-19 pandemic. 1 The letter notably emphasizes Japan's mortality outcomes, suggesting a comparative success against global standards based on the direct fatalities from COVID-19. 1 This perspective, while valuable, may overlook the broader spectrum of impacts that cannot be explained without considering aspects such as excess mortality, engendered by the COVID-19 pandemic and the response measures implemented.The argument posited by Korsgaard, focusing primarily on COVID-19 as a direct cause of death, 1 merits expansion to encompass the nuanced effects of the pandemic response on the broader population.According to the Ministry of Health, Labor and Welfare's vital statistics,

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The impact of declaring the state of emergency on human mobility during COVID-19 pandemic in Japan

Cited by 6 publications

References 25 publications

Novel indicator for the spread of new coronavirus disease 2019 and its association with human mobility in Japan

Novel indicator for the spread of new coronavirus disease 2019 and its association with human mobility in Japan

Surveillance of seasonal influenza viruses during the COVID‐19 pandemic in Tokyo, Japan, 2018–2023, a single‐center study

All‐cause mortality and Japan's early countermeasures: Authors' reply

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