Figure 1

Epidemic curve indicating the week when each of 13 incident cases was identified (i.e.: first anti-HCV positive test). In particular 7 cases where reported on 27 July, 2 on 3 August, 1 on 30 August, 1 on 8 September 1 on 27 September and 1 on 28 September (case occurred on 27 and 28 September were reported on the same week). Light grey squares indicate cases who underwent HD in the afternoon shift of the 20 April 2005. Dark grey squares are for subjects who did not undergo HD in the afternoon shift of the 20 April 2005. Red lines define a four week periods.