🦠 HIV PEP/PrEP Risk Calculator After STI Exposure

Characterizing the Exposure Event

Placeholder: classify contact type and partner status first.

• Sexual: Contact type (placeholder category)
• Unknown/+: Partner status (placeholder factor)
• None/broke: Condom use (placeholder factor)
• Mucosal: Fluid exposure (placeholder factor)

Why exposure type matters

Placeholder: exposure type sets the baseline risk tier.

Hours-Since-Exposure Countdown

Placeholder: the PEP window closes hard at 72 hours.

• 72h: Window length (placeholder threshold)
• <2h: Ideal start (placeholder guidance)
• Time-dependent: Efficacy decay (placeholder note)
• PEP closed: Past 72h (placeholder outcome)

Why the clock matters

Placeholder: earlier PEP start improves protective effect.

PEP Pathway Routing

Placeholder: acute exposures within window route to PEP.

• Same day: Regimen start (placeholder timing)
• 28 days: Course length (placeholder duration)
• 6-12 wks: Follow-up test (placeholder schedule)
• Regimen sim: See also (placeholder cross-link)

What happens after routing

Placeholder: routed cases proceed to regimen selection tool.

Ongoing Risk Profile Assessment

Placeholder: score recurring behavioral and partner risk factors.

• 0-10: Risk score range (placeholder scale)
• 0-3: Low tier (placeholder cutoff)
• 4-6: Moderate tier (placeholder cutoff)
• 7-10: High tier (placeholder cutoff)

Why ongoing profile matters

Placeholder: repeated risk favors prevention, not one-off PEP.

PrEP Pathway Routing

Placeholder: sustained risk routes toward daily or on-demand PrEP.

• Risk ≥4: Eligibility signal (placeholder threshold)
• Risk ≥7: Strong signal (placeholder threshold)
• Labs + counsel: Start visit (placeholder step)
• Eligibility sim: See also (placeholder cross-link)

What happens after routing

Placeholder: routed cases proceed to eligibility screening tool.

Placeholder: this tool only triages — it does not prescribe regimens.