1/4 Today's recommendations on blood donation in the UK include that PrEP users continue to be deferred for blood donation. This recommendation does not question the efficacy of PrEP.
2/4 When PrEP is used as recommended it is almost 100% effective. Rather, the recommendation is based on current evidence that shows that PrEP use can extend the HIV testing window period.
3/4 If someone is newly infected with HIV when they start PrEP, their recent infection might not show up as soon on an HIV test and give an HIV negative test result when the individual has HIV.
4/4 This is an issue being considered by @BASHH_UK + @BritishHIVAssoc in their current review of PrEP guidelines and it is pragmatic that this deferral remains in place until the review of those guidelines, supported by current and emerging evidence, has been completed.
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