Fig. 2

The cumulative effects of meteorological factors on HFMD over lag 0–14 days in Guangdong, 2009–2013. a and b show the cumulative relative risks of HFMD associated with temperature and relative humidity, respectively. The bold red line represents the pooled effects, and the dashed lines represent the city-specific estimates. Reference values were the medians, that is, 23.5 °C for temperature and 78.0 % for relative humidity