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Combination prevention

Post-exposure prophylaxis

Medical, behavioral, community and structural approaches work together.

Publisher
The Bach Foundation
Audience
Public · Professional · Research
Last reviewed
18 August 2026
Status
Source-linked
Jurisdiction
Global context; local guidance may vary

Essential answer

Post-exposure prophylaxis, or PEP, is a time-sensitive course of antiretroviral medicine considered after a possible exposure. Seek qualified local assessment as soon as possible.

Combination prevention brings biomedical, behavioral, community and structural approaches together. The most appropriate mix depends on route, timing, preference, access and local guidance.

Complete public explanation

Medical, behavioral, community and structural approaches work together.

Use the information with its source date, population and jurisdiction. A general explanation cannot determine an individual’s diagnosis, eligibility, regimen or legal obligations.

Key considerations

  • No single prevention option fits every person or situation.
  • Testing can support access to prevention and timely treatment.
  • PrEP acts before exposure; PEP is a time-sensitive option after a possible exposure.
  • Treatment with sustained viral suppression prevents sexual transmission.

Research and evidence questions

01Which combinations are acceptable and sustainable in each setting?
02How can long-acting options be delivered equitably?
03Which policies reduce structural barriers to prevention?
04How should programmes measure coverage, persistence and choice?

Professional and academic evidence

Professional interpretation of post-exposure prophylaxis adds study design, population, comparator, outcomes, statistical methods, limitations, conflicts, guideline adoption, geographic applicability, replication and integrity status.

Evidence record fields for Post-exposure prophylaxis
FieldWhat the Center displays
Meaning and scopeDefinition, mechanism, intended use and what should not be inferred.
Population and jurisdictionAge, sex and gender, geography, HIV subtype, clinical context and issuing authority.
OutcomeClinical, virologic, diagnostic, public-health or implementation outcome and follow-up.
ProvenanceOriginal source, identifier, version, funding, conflicts, access date and review.
IntegrityProtocol changes, corrections, expressions of concern, retractions and later evidence.

Principal sources and evidence gateways

Links checked 18 August 2026
01
WHO guidelines on lenacapavir for HIV prevention and testing strategiesWorld Health Organization · Guideline · Access checked 18 Aug 2026
02
Clinical guidelines for HIV prevention and treatmentNIH Clinicalinfo · Guideline · Access checked 18 Aug 2026
03
ClinicalTrials.gov HIV study registryU.S. National Library of Medicine · Registry · Access checked 18 Aug 2026
Additional permanent evidence gateways