From: Risk factors for acquisition of hepatitis C virus infection: a case series and potential implications for disease surveillance
NO. RISK FACTORS
NO. PATIENTS (%)
No known risk factor
7 (4.7)
1
23 (15.5)
2
41 (27.7)
3
38 (25.7)
4
21 (14.2)
5
13 (8.8)
6
5 (3.4)