Table 1 R² values for regression models with number of active COVID-19 cases regressed on number of tweets related to COVID-19 at the county level. Linear and exponential models were computed for both same-day tweets and time-lagged tweet day predicting active cases. Greener shading indicates higher R² values within that table; otherwise, shading is relative to row values

From: A longitudinal and geospatial analysis of COVID-19 tweets during the early outbreak period in the United States