Table 2 Daily average contact rates in the household, during social activities, and in casual contact groups
Group Infected Susceptible Contact rate (on average)
Household Child Child 0.6a
Child Adult 0.3a
Adult Child 0.3a
Adult Adult 0.4a
Social activity group
 Playgroup Child (3–6 years) Child (3–6 years) 0.25a
 Elementary school Child (7–12 years) Child (7–12 years) 0.0435a
 High school Child (13–18 years) Child (13–18 years) 0.0375a
 College Adult (19–22 years) Adult (19–22 years) 0.0315a
 Work Adult (19–64 years) Adult (19–64 years) 0.0575a
Casual contact group
 Low Anyone Child (0–4 years) 0.0000181a
Anyone Child (5–18 years) 0.0000544a
Anyone Adult (19–64 years) 0.000145a
Anyone Adult (65–years) 0.0002175a
 High Anyone Child (0–4 years) 0.000543
Anyone Child (5–18 years) 0.001632
Anyone Adult (19–64 years) 0.00435
Anyone Adult (65–years) 0.006525
aRefer to [12]