From: Recent household transmission of tuberculosis in England, 2010–2012: retrospective national cohort study combining epidemiological and molecular strain typing data
Treatment delay
Median days (IQR)
Index casea (n = 488)
65 (34–124)
All subsequent casesa (n = 512)
40 (18–85)
Subsequent symptomaticb cases (n = 110)
61 (31–177)
Subsequent asymptomaticb cases (n = 402)
37 (16–70)