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. 2020 Jun 4;138:109959. doi: 10.1016/j.chaos.2020.109959

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Fig 8 — Stochastic modeling: the simulated particle plumes at different times (t=0, 20, 50, and 100 at the 1st, 2nd, 3rd, and 4th columns) for three scenarios to mitigate the COVID-19 outbreak in a city: Scenario 1 (S1): no constraint (1st row) (a)~(d), Scenario 2 (S2): Social distancing (2nd row) (e)~(h), and Scenario 3 (S3): Quarantining (3rd row) (i)~(l).