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Median number of direct contacts (physical and non-physical) by a socioeconomic status quintile, b gender, c respondent age, d education level, and e household size. Each panel shows the median, hinges (25th and 75th percentiles), and whiskers representing upper and lower adjacents. Outliers are not displayed in boxplots for scale; these are plotted in f showing the distribution of the number of direct contacts reported
