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Table 4 Relative risk of infection over time given presence of an index case

From: Invasive meningococcal disease epidemiology and control measures: a framework for evaluation

Setting 0 to 6 days 7 to 30 days 31 to 365 days
Household 1200 150 8
Primary School 60 13 1
High School 160 7 1
College 1.8 1.5 1
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