Table 2.

Secondary Case Rate by Study Setting

Setting	Number of Studies	Total Index Patients	Number of pediatric cases	Number of adult cases	Number of total cases	Case Ratea
Childcare	6	54	26	53	79	1.46
Household	22	314	85	159	244	0.78
Social Event	5	23	13	15	28	1.22
School	16	142	68	50	118	0.83
All Settings	39b	457	149	206	355	0.78

^aCase rate defined as the number of confirmed infections among all contacts, not considering the total number of contacts as not all contacts were known across all studies.

^bOne study (Danis et al) was excluded because it did not differentiate between pediatric vs. adult cases