A cross-sectional study of susceptibility to vaccine-preventable diseases among prison entrants in New South Wales.

OBJECTIVES: To determine the prevalence of susceptibility to measles, mumps, rubella, varicella and hepatitis B virus (HBV) among New South Wales prison entrants and to compare results for prison entrants with those of a community sample. DESIGN AND SETTING: Between 11 October 2010 and 24 October 2010, new entrants at seven adult correctional centres completed a cross-sectional survey and provided a venous blood sample. PARTICIPANTS: All adults entering the correctional centres were eligible to participate, with 211 completing the survey (response rate 68%). MAIN OUTCOME MEASURES: Serological evidence of immunity to measles, mumps, rubella, varicella and HBV. Prison data were compared with community data obtained from the 2007 Australian National Serosurveillance Program. RESULTS: Over half of the participants (106/204, 52%) were susceptible to HBV, followed by susceptibility to mumps (82/198, 41%), rubella (33/209, 16%), measles (27/203, 13%) and varicella (19/198, 10%). Having no history of drug injection was a significant predictor of susceptibility to measles, mumps and HBV. Prison entrants were significantly less likely than people in the community to be susceptible to varicella (10% versus 18%; risk ratio [RR], 1.9; 95% CI, 1.1-3.2) and HBV (52% versus 65%; RR, 1.3; 95% CI, 1.1-1.5). CONCLUSIONS: Prison entrants are susceptible to a number of vaccine-preventable diseases. We recommend a cost-benefit analysis of implementing routine vaccination for measles, mumps, rubella and varicella and an exploration of options for improving uptake of HBV vaccination.