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Transfusion. 2009 Jun;49(6):1102-14. doi: 10.1111/j.1537-2995.2009.02124.x. Epub 2009 Mar 20.

Quantitative estimate of the risks and benefits of possible alternative blood donor deferral strategies for men who have had sex with men.

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1
Center for Biologics Evaluation and Research, US Food and Drug Administration, Rockville, MD 20852-1448, USA.

Abstract

BACKGROUND:

Implementation of sensitive screening methods for human immunodeficiency virus (HIV) and hepatitis viruses prompts the question of what quantitative risks may result from altered deferral strategies for donation of blood by men who have had sex with men (MSM).

STUDY DESIGN AND METHODS:

Quantitative probabilistic models were developed to assess changes in the residual risk of transfusion-transmitted HIV and hepatitis B virus (HBV) associated with blood testing and quarantine release errors (QREs) in the initial year of two hypothetical policy scenarios that would allow donations from donors who have abstained from MSM behavior for at least 5 years (MSM5) or at least 1 year (MSM1).

RESULTS:

The MSM5 and MSM1 models, respectively, predicted annual increases in units of HIV-infected blood of 0.5% (0.03 mean additional units; 95% confidence interval [CI], 0-1) and 3.0% (0.18 mean additional units; 95% CI, 0-1) over current estimated HIV residual risk using recent, nationwide biologic product deviation reports to estimate QRE rates. These estimates are approximately 10-fold lower than estimates based on New York State QRE data from the previous decade. The models predicted smaller increases in infectious HBV donations.

CONCLUSIONS:

QREs remain the most significant preventable source of risk. More accurate inputs, including the percentage of MSM in the population, the percentage of MSM who have abstained from MSM activity for 1 or 5 years, the prevalence of HIV and HBV in MSM who have abstained from MSM activity for 1 or 5 years, the rate of self-deferral, and QRE rates, are required before making more precise predictions.

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