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. 2020 Dec 4;6(49):eabd6370. doi: 10.1126/sciadv.abd6370

Fig. 2. Asynchronous reduction of effective reproductive numbers.

Fig. 2

For each county, we show the date when the local effective reproductive number dropped below 1.5 (A), 1.25 (B), 1 (C), and 0.75 (D) and stayed below that threshold until 3 May. Counties in gray are those that either never reached the threshold or failed to remain below the threshold.