Fig. 2: Boxplots of six air pollutants, six meteorological conditions and the number of scarlet fever cases in four seasons from 2013 to 2018.
From: Exposure to air pollution and scarlet fever resurgence in China: a six-year surveillance study
a The seasonal pattern of air pollutants. b The seasonal pattern of weather conditions. c The seasonal pattern of scarlet fever. An analysis of variance (ANOVA) test is applied to examine the values or concentrations among the four seasons. A Kruskal–Wallis test is used to examine the scarlet fever incidences among the four seasons: spring (March to May), summer (June to August), autumn (September to November), and winter (December to February). PM2.5 particulate matter with aerodynamic diameter <2.5μm. PM10 particulate matter with aerodynamic diameter <10μm, SO2 sulfur dioxide, NO2 nitrogen dioxide, O3 ozone, CO carbon monoxide, Mean Temp mean temperature, RH relative humidity, AP air pressure, WS wind speed. Source data are provided as a Source Data file.
