A study of HIV among incarcerated individuals in Iowa during 2000-2004 found that among 596 individuals tested for HIV upon entry into a detention facility, 26 were HIV-seropositive. Individuals who were HIV-seronegative were followed for a total of 3407 person-years and retested for HIV upon release. During the course of their detention, 4 individuals were identified as being HIV-seropositive. Assume that these 4 individuals acquired HIV during their time in detention. Based on the above information, what is the cumulative incidence of HIV infection among incarcerated individuals in Iowa?
Question 4 options:
4/596
30/592
30/596
4/570