Locale

The instantaneous reproduction number (R) is estimated using the daily incidence of new cases, while including effects of social distancing, population density, and combined temperature and humidity lagged over the prior 14 days.

This model projects the effect of a theoretical May 15 midway return of normal travel to non-essential businesses. Future cases are estimated from predicted values of R.

SOURCE: COVID-Lab

map of europe

Visualizing COVID-19’s Rt

Effective Rt

The effective reproduction number (Rt) characterizes the COVID-19 spread rate, defined as the average number of secondary infectious cases produced by a primary infectious case. It’s used to define the potential for spread at a specific time. If Rt > 1, the virus will spread out and the disease will become an epidemic; if Rt = 1, the virus will spread locally and the disease is endemic; if Rt < 1, the virus will stop spreading and the disease will disappear eventually.

INTERACTIVE MAP: covid19-analysis.org

map of europe

Los Angeles

The instantaneous reproduction number (R) is estimated using the daily incidence of new cases, while including effects of social distancing, population density, and combined temperature and humidity lagged over the prior 14 days.

This model projects the effect of a theoretical May 15 midway return of normal travel to non-essential businesses. Future cases are estimated from predicted values of R.

SOURCE: COVID-Lab