Alliance for Pandemic Preparedness

April 15, 2020

Time-Varying COVID-19 Reproduction Number in the United States

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  • Gunzler and Sehgal calculated the current reproduction number (R0) for COVID-19 for each state in the United States. For the entire United States, they report that the time-varying R0 declined from 4.02 to 1.51 between March 17 and April 1, 2020, suggesting that social isolation measures may be having a beneficial effect.

Gunzler and Sehgal (April 15 2020). Time-Varying COVID-19 Reproduction Number in the United States. Pre-print downloaded Apr 15 from https://doi.org/10.1101/2020.04.10.20060863.