Fig. 1
From: Quantifying heterogeneous contact patterns in Japan: a social contact survey
Distributions of contact frequency and age of sample population in Japan. a Log-log plot of contact frequency distribution. Logarithm of the proportion of the sample population was taken against the number of contacts (contact frequency) per day. b Age distribution of the study sample (bars) by age group and sex. Dashed lines represent the age distributions of the entire population of Japan as of 1 November 2016, overlaid with the sample population