Evaluation of a pre-exposure prophylaxis (PrEP)/post-exposure prophylaxis (PEP) deferral policy among blood donors.

Not all blood services have adopted direct questions to identify PrEP/PEP exposure; some rely on existing DHQ questions. In Canada, despite DHQ questions such as medication use in the last 3-days, more than half of people exposed to PrEP/PEP would not have been identified and deferred.