Three primary cluster cases had respiratory disease (3 of 5, 60%) compared with 34% of all non-cluster cases (380 of 1,133); although, potentially important, this difference did not reach statistical significance (RR: 3.0; 95% CI: 0.5–17.6; p = 0.3).
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Household transmission of invasive group A Streptococcus infections in England: a population-based study, 2009, 2011 to 2013.
1
0.3000
0.3000