Fig. 4

Overall cumulative relative risks (RRs) of deaths from respiratory diseases across lag 0–35 days (with 95% CI, shaded grey) in Guangzhou and daily mean absolute humidity distribution. The blue line shows low absolute humidity effect and the red line shows high absolute humidity effect. The middle shallow dotted line is minimum mortality absolute humidity (MMAH), and the dotted lines on the left and right represent the 2.5 and 97.5% of absolute humidity, respectively