From: The association between the seasonality of pediatric pandemic influenza virus outbreak and ambient meteorological factors in Shanghai
Meteorological factors
Mean temperature (°C)
PM1(ppm)
Cumulative extreme cold effects (95% CI)
Cumulative extreme high PM1effects (95% CI)
All age children (0–18 years)
29.74 (18.36, 48.15)
14.55 (10.55, 20.07)