Fig. 3
From: Airborne particulate matter, population mobility and COVID-19: a multi-city study in China
The exposure-response curves of MSI, PM10, PM2.5 and the daily COVID-19 confirmed cases in 63 cities of China from January 01 to March 02, 2020. Note: (a) MSI; (b) PM10; (c) PM2.5. The X-axis is the values of MSI, PM10, PM2.5 in lag 07 or lag 014 days, Y-axis is the predicted log relative risk (RR), is shown by th color solid line, and the color dotted lines represent the 95% confidence interval (CI). The R2 represents the fitting effect, and the closer R2 is to 1, the better the fitting effect of the model