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Event-specific interventions to minimize COVID-19 transmission [Applied Mathematics]
Proceedings of the National Academy of Sciences of the United States of America ( IF 9.412 ) Pub Date : 2020-11-19 , DOI: 10.1073/pnas.2019324117
Paul Tupper, Himani Boury, Madi Yerlanov, Caroline Colijn

COVID-19 is a global pandemic with over 25 million cases worldwide. Currently, treatments are limited, and there is no approved vaccine. Interventions such as handwashing, masks, social distancing, and “social bubbles” are used to limit community transmission, but it is challenging to choose the best interventions for a given activity. Here, we provide a quantitative framework to determine which interventions are likely to have the most impact in which settings. We introduce the concept of “event R,” the expected number of new infections due to the presence of a single infectious individual at an event. We obtain a fundamental relationship between event R and four parameters: transmission intensity, duration of exposure, the proximity of individuals, and the degree of mixing. We use reports of small outbreaks to establish event R and transmission intensity in a range of settings. We identify principles that guide whether physical distancing, masks and other barriers to transmission, or social bubbles will be most effective. We outline how this information can be obtained and used to reopen economies with principled measures to reduce COVID-19 transmission.

更新日期:2020-11-21
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