Table 1.

Summary statistics for dependent variables of interest and covariates used for MIDAS specification

Variable (unit)	Mean	Range
Influenza Case Counts (Monthly)	102.13	(0, 13,214)
Pneumonia Case Counts (Monthly)	203.88	(0, 3144)
Absolute Humidity	26.78	(15.7, 40.98)
Relative Humidity (%)	76.36	(45.87, 91.68)
Total Precipitation (mm)	0.18	(0, 1.24)
Temperature (K)	300.08	(290.79, 307.65)
CO Surface Concentration (ppb)	172.19	(50.56, 1090.3)
SO2 Surface Concentration (mu/g)	5.07	(0.05, 59.52)
PM2.5 Surface Concentration (mu/g)	19.05	(1.51, 367.24)