Fig. 4From: Close contact infection dynamics over time: insights from a second large-scale social contact survey in Flanders, Belgium, in 2010-2011Estimated age- and sex-specific average number of contacts for the 2010-2011 survey. a male-male contacts, b male-female contacts, c female-male contacts and d female-female contacts. The color scale indicates the number of contacts from low (white) to high (red)Back to article page