Effectiveness of COCOA, a COVID-19 contact notification application, in Japan
Kurita, J.; Sugawara, T.; Ohkusa, Y.
Show abstract
BackgroundCOCOA, a contact reporting application in Japan, was launched at the end of June 2020. ObjectWe assessed effectiveness of COCOA. MethodAfter developing a simple susceptible-infected-recovery model with COCOA and voluntary restrictions against going out (VRG), we assumed that COCOA can reduce infectiousness by 10-50% points through self-quarantine at home after receiving notification from COCOA. ResultsCOCOA alone is insufficient to halt an outbreak. Even if the entire population were to use COCOA, the reproduction number would be 1.31. However, if VRG were 15%, about half of the maximum VRG effectiveness under the emergency state declaration, then 10% COCOA use by a population can reduce the reproduction number to less than one. ConclusionSignificant effects of COCOA for reducing the reproduction number were found. However, without VRG, COCOA alone is insufficient to control an outbreak.
Matching journals
The top 6 journals account for 50% of the predicted probability mass.
Similar papers in this journal
- The relationship between new PCR positive cases and going out in public during the COVID-19 epidemic in Japan 94%
- Modelling the impact of behavioural interventions during pandemics: A systematic review 93%
- Control Strategies against COVID-19 in China: Significance of Effective Testing in the Long Run 93%
Similar papers in this journal
- The psychological impact of 'mild lockdown' in Japan during the COVID-19 pandemic: a nationwide survey under a declared state of emergency 93%
- Using A Socio-Ecological System (SES) Framework to Explain Factors Influencing Countries’ Success Level in Curbing COVID-19 92%
- Effect of preventive actions and health care factors in controlling the outbreaks of COVID-19 pandemic 92%
Similar papers in this journal
- Border Restriction as a Public Health Measure to Limit Outbreak of Coronavirus Disease 2019 (COVID-19) 92%
- Behavioral changes before lockdown, and decreased retail and recreation mobility during lockdown, contributed most to the successful control of the COVID-19 epidemic in 35 Western countries 91%
- Effect of different resumption strategies to flatten the potential COVID-19 outbreaks amid society reopens: a modeling study 91%
Similar papers in this journal
- Modelling Quarantine Effects on SARS-CoV-2 Epidemiological Dynamics in Chilean Communes and their Relationship with the Social Priority Index 92%
- The Effects of "Fangcang, Huoshenshan, and Leishenshan" Makeshift Hospitals and Temperature on the Mortality of COVID-19 92%
- Exploratory Study to Characterise the Individual Types of Health Literacy and Beliefs and Their Associations with Infection Prevention Behaviours amid the COVID-19 Pandemic in Japan: A Longitudinal Study 91%
Similar papers in this journal
- The efficacy of soap against schistosome cercariae: A systematic review 93%
- A randomised controlled trial of raw honey for the healing of ulcers in leprosy in Nigeria 92%
- Nudge strategies for behavior-based prevention and control of neglected tropical diseases: a scoping review and ethical assessment 92%
"Similar papers" are the closest papers from that journal in the model's embedding space. They show what the match is built on, but the ranking comes mostly from a classifier over the whole training set, not from these examples alone.