10.1 Personal Protective Equipment (PPE) & Residential Infection Control

10.1 Personal Protective Equipment (PPE) & Residential Infection Control

Quick Summary: Community Paramedics practice in uncontrolled, biologically unpredictable home environments that lack hospital-grade engineering controls, automated airflow exchanges, and sterile surfaces. Mastering Domain 4 (Community Paramedic Wellness and Safety) requires distinguishing Standard Precautions from Transmission-Based Precautions (Contact, Droplet, Airborne), implementing non-engineered isolation strategies in private domiciles, executing flawless PPE donning and doffing sequences to prevent self-contamination, adhering to Spaulding disinfection criteria and EPA wet contact kill times, maintaining strict 'clean vs. dirty' zoning in mobile kits and vehicles, and rapidly managing occupational bloodborne exposures with emergency post-exposure prophylaxis (PEP).

Infection prevention in mobile integrated healthcare is fundamentally distinct from hospital-based infection control. In an acute-care facility, patients with communicable pathogens are placed into negative-pressure airborne infection isolation rooms (AIIR), high-touch surfaces are made of non-porous medical-grade laminates, and dedicated environmental services personnel execute standardized terminal cleanings. In contrast, the Community Paramedic enters living rooms, basements, and cramped bedrooms featuring porous fabric upholstery, shag carpeting impregnated with biological detritus, poor ventilation, and active cohabitation with family members and domestic animals. Preventing cross-contamination between consecutive home visits requires an uncompromising commitment to aseptic discipline, rigorous personal protective equipment protocols, and mobile barrier management.

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Standard Precautions vs. Transmission-Based Precautions

Infection control operates on a two-tiered hierarchy established by the Centers for Disease Control and Prevention (CDC) and the Healthcare Infection Control Practices Advisory Committee (HICPAC): Standard Precautions and Transmission-Based Precautions.

CDC INFECTION CONTROL HIERARCHY
┌─────────────────────────────────────────────────────────────────────────┐
│ TIER 1: STANDARD PRECAUTIONS                                            │
│ Universal baseline applied to ALL patients regardless of presumed       │
│ infection status. Hand hygiene, gloves for bodily fluids, mask/gown     │
│ if splashes anticipated, respiratory hygiene/cough etiquette.           │
└────────────────────────────────────┬────────────────────────────────────┘
                                     │ Escalates When Pathogen Identified
                                     ▼
┌─────────────────────────────────────────────────────────────────────────┐
│ TIER 2: TRANSMISSION-BASED PRECAUTIONS (Applied Synergistically)         │
├────────────────────┬────────────────────┬───────────────────────────────┤
│ CONTACT            │ DROPLET            │ AIRBORNE                      │
│ Direct/indirect    │ Large droplets     │ Microscopic droplet nuclei    │
│ surface contact    │ (> 5 µm) <= 6 ft   │ (<= 5 µm) suspended in air    │
│ (MRSA, VRE,        │ (Influenza,        │ (Tuberculosis, Measles,       │
│ C. diff, Scabies)  │ Pertussis, Mumps)  │ Varicella / Disseminated Zoster)│
└────────────────────┴────────────────────┴───────────────────────────────┘

Tier 1: Standard Precautions

Standard Precautions represent the minimum infection prevention practices applicable to all patient care, based on the principle that all blood, body fluids, secretions, excretions (except sweat), non-intact skin, and mucous membranes may harbor transmissible infectious agents. Key components include:

• Hand Hygiene: The cornerstone of infection prevention. Community Paramedics must use an alcohol-based hand rub (ABHR) containing 60% to 95% ethanol or isopropanol before touching a patient, before clean/aseptic procedures, after body fluid exposure, after touching patient surroundings, and immediately after removing gloves.
• Personal Protective Equipment (PPE): Gloves must be donned whenever contact with blood, mucous membranes, non-intact skin, or infectious material is anticipated. Fluid-resistant gowns, surgical face masks, and eye protection (goggles or full-face shields) must be added whenever clinical activities are likely to generate splashes, sprays, or droplets of blood or secretions.
• Respiratory Hygiene / Cough Etiquette: Providing facial tissues, touch-free waste receptacles, and surgical masks to coughing patients upon initial contact.
• Environmental & Equipment Decontamination: Routine cleaning and disinfection of diagnostic tools between encounters.

Tier 2: Transmission-Based Precautions

Transmission-Based Precautions are instituted whenever a patient is known or suspected to be infected with epidemiologically significant pathogens transmitted by contact, droplet, or airborne routes:

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Residential Challenges: Home Infection Control Without Engineering

In acute healthcare facilities, airborne containment relies on Airborne Infection Isolation Rooms (AIIR) engineered to maintain negative air pressure relative to surrounding corridors, providing a minimum of 12 air changes per hour (ACH) for new construction (6 ACH for older facilities) and discharging air directly outdoors or through dedicated HEPA filters. Residential homes possess zero negative pressure engineering, average fewer than 0.5 to 1.5 air changes per hour, and circulate air through closed forced-air central HVAC systems that distribute airborne pathogens throughout the entire residence.

Non-Engineered Residential Isolation Protocols

When encountering suspected active airborne pathogens (such as a chronic cough with hemoptysis, night sweats, and unintentional weight loss indicating pulmonary tuberculosis, or fever accompanied by a diffuse maculopapular rash suggesting measles), the Community Paramedic must implement makeshift isolation mechanics:

1. Immediate Source Control: Place a standard fluid-resistant surgical mask tightly over the patient's mouth and nose. Source control drastically blunts forward droplet velocity and limits droplet nuclei aerosolization at the physical emission source.
2. Respiratory Protection for the Clinician: The paramedic must don a properly fit-tested NIOSH N95 respirator (or P100 elastomeric respirator) before crossing the threshold into the residence. Surgical masks provide zero airborne filtration for the clinician and are strictly prohibited as personal respiratory protection against airborne droplet nuclei.
3. Mechanical Natural Cross-Ventilation: Open exterior windows and exterior doors in the patient's room to facilitate outward dilution of airborne particles, weather permitting. Avoid operating central HVAC fans or window air conditioners that recirculate indoor air back into other household rooms where family members reside.
4. Perimeter Isolation: Instruct all non-essential household contacts, children, and visitors to relocate to a separate, closed room or step outdoors during the visit.
5. Prohibition of In-Home Aerosol-Generating Procedures (AGPs): Open tracheal suctioning, non-invasive positive pressure ventilation (CPAP/BiPAP), high-flow nasal cannula (HFNC) therapy > 15 L/min, and jet nebulizer treatments generate massive clouds of respirable aerosols. Jet nebulizers should be replaced with Metered-Dose Inhalers (MDIs) paired with a valved holding chamber (spacer). If an AGP is unavoidable due to acute life-threatening respiratory failure, it must be performed outdoors or in an open-window environment while wearing an N95 and face shield, escalating to immediate emergency 911 transport.

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PPE Donning and Doffing Mechanics in Uncontrolled Settings

The greatest vulnerability for clinician self-contamination and pathogen dissemination occurs during the doffing (removal) sequence, particularly when peeling off contaminated gloves and gowns. Community Paramedics must maintain strict procedural discipline when putting on and taking off gear.

PPE DONNING SEQUENCE (Clean Entry Zone / Exterior)        PPE DOFFING SEQUENCE (At Exit / Domicile Threshold)
[1. Hand Hygiene]                                         [1. Gloves] (Pinch-and-cuff or glove-in-glove)
      │                                                         │
      ▼                                                         ▼
[2. Isolation Gown] (Tie securely neck & waist)           [2. Goggles / Face Shield] (Touch straps only)
      │                                                         │
      ▼                                                         ▼
[3. Respirator / Mask] (Fit-tested N95; seal check)       [3. Isolation Gown] (Pull away from body, roll inside-out)
      │                                                         │
      ▼                                                         ▼
[4. Eye Protection] (Goggles or face shield)              [4. N95 Respirator] (Remove by bottom then top strap)
      │                                                         │
      ▼                                                         ▼
[5. Examination Gloves] (Pull cuffs OVER gown wrists)     [5. Immediate Hand Hygiene] (ABHR or Soap & Water)

Donning Sequence (Prior to Patient Contact)

1. Hand Hygiene: Cleanse hands thoroughly using ABHR for at least 20 seconds, rubbing all surfaces until completely dry.
2. Isolation Gown: Don fluid-resistant gown; fasten neck and waist ties securely, ensuring complete torso coverage from neck to knees and arms to end of wrists.
3. Respirator / Mask: Place N95 respirator over nose and mouth. Pull top elastic strap over head to the crown; position bottom strap around the neck below the ears. Mold the flexible metallic nosepiece over the nasal bridge with both hands. Perform a User Seal Check:
   • Positive Pressure Check: Exhale gently; the respirator should bulge slightly without air leaking around the perimeter.
   • Negative Pressure Check: Inhale sharply; the respirator should collapse slightly inward. If air leaks at the edges, readjust the nosepiece and strap tension until a hermetic seal is achieved.
4. Eye Protection: Position goggles or face shield over eyes and forehead. Eyeglasses are not rated eye protection because they lack top, bottom, and lateral peripheral splash shields.
5. Gloves: Don non-sterile nitrile gloves, extending the glove cuffs over the elastic wrists of the isolation gown to ensure zero exposed forearm skin.

Doffing Sequence (At the Domicile Threshold / Exit Zone)

Critical Rule: The outside front and sleeves of the gown, front of the eye protection, outside of the mask, and exterior surfaces of gloves are contaminated! Touch only clean interior surfaces and rear elastic straps.

1. Gloves First (Method 1 - Glove-in-Glove): Grasp the outside edge of the opposite glove near the wrist; peel away from hand, turning the glove inside-out. Hold the peeled glove in the remaining gloved hand. Slide an ungloved finger under the wrist cuff of the remaining glove; peel off over the first glove, creating a clean inside-out packet. Discard directly into a red biohazard waste bag.
   • Alternative Method (Combined Gown-and-Glove Removal): Grasp the gown front, pull away from the torso to break ties, and peel gown downward while rolling sleeves and gloves inside-out in one continuous motion, enclosing the gloves inside the gown bundle.
2. Goggles / Face Shield: Grasp the rear elastic headband or ear rests from behind; lift upward and away from the face without touching the front shield surface. Discard into biohazard bag or place in dedicated decontamination tray.
3. Isolation Gown (if not removed with gloves): Unfasten ties; peel gown away from neck and shoulders, touching only the inside lining. Fold and roll gown inside-out into a compact bundle; discard into biohazard bag.
4. Respirator / Mask: Touch only the rear elastic straps! Grasp the bottom strap first and pull over the head, then grasp the top strap and pull over the head. Allow the respirator to drop forward away from the face into the waste receptacle. Never touch the front filter surface!
5. Hand Hygiene: Immediately cleanse bare hands with ABHR or thoroughly wash with soap and running water for at least 20 seconds if hands are visibly soiled or if managing a spore-forming pathogen.

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Equipment Disinfection: Spaulding Classification & Wet Contact Kill Times

Reusing diagnostic and therapeutic equipment across multiple patient domiciles without validated disinfection represents a primary vector for healthcare-associated infections (HAIs) in community medicine. All equipment reprocessing must comply with the Spaulding classification system, established by Dr. Earle Spaulding:

SPAULDING REPROCESSING CLASSIFICATION
┌────────────────────────────────────────────────────────────────────────┐
│ CRITICAL: Enters sterile tissue or vascular system                     │
│ (Surgical instruments, IV needles, urinary catheters)                  │
│ REQUIRED LEVEL: STERILIZATION (Autoclave, Ethylene Oxide, Single-Use)  │
├────────────────────────────────────────────────────────────────────────┤
│ SEMI-CRITICAL: Contacts mucous membranes or non-intact skin            │
│ (Laryngoscope blades, nebulizer chambers, vaginal/rectal probes)       │
│ REQUIRED LEVEL: HIGH-LEVEL DISINFECTION (Glutaraldehyde, OPA, Sterrad) │
├────────────────────────────────────────────────────────────────────────┤
│ NON-CRITICAL: Contacts intact skin only                                │
│ (Stethoscopes, BP cuffs, pulse oximeters, glucometer cases, jump bags) │
│ REQUIRED LEVEL: LOW- TO INTERMEDIATE-LEVEL DISINFECTION                │
│ (EPA-registered hospital wipes: Quaternary Ammonium, Bleach, AHP)      │
└────────────────────────────────────────────────────────────────────────┘

The Golden Rule of Disinfection: Wet Contact Kill Time

A chemical disinfectant does not instantly sterilize surfaces upon contact. Every EPA-registered hospital disinfectant wipe requires a strictly enforced wet contact kill time (dwell time)—the exact duration the treated surface must remain visibly glistening wet with the chemical agent to achieve the documented logarithmic reduction of targeted viruses, bacteria, mycobacteria, and fungal spores.

[!WARNING] Premature Drying Invalidates Disinfection: If a paramedic wipes down a blood pressure cuff and pulse oximeter with a 4-minute bleach wipe and immediately dries the devices with a paper towel, or allows them to dry in 60 seconds in a hot car, zero disinfection occurs for resilient pathogens such as C. diff or hepatitis B. The surface must remain continuously wet for the full duration specified on the manufacturer's label. If evaporation occurs before the dwell time elapses, re-wipe immediately!

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Mobile Kit Management: 'Clean vs. Dirty' Zoning

Community Paramedicine response vehicles and mobile jump kits function as rolling healthcare units. Cross-contamination between the domicile and the vehicle is prevented by maintaining strict spatial zoning.

RESPONSE VEHICLE & FIELD CLEAN/DIRTY ZONING
┌───────────────────────────────────────┬───────────────────────────────────────┐
│ VEHICLE CAB / FRONT INTERIOR          │ VEHICLE REAR / TREATMENT & STORAGE    │
│ Strictly 'CLEAN ZONE'                 │ Segregated 'CLEAN' and 'DIRTY' Bins   │
│ - Zero contaminated PPE permitted     │ - Clean inventory locked in cabinets  │
│ - Clean documentation tablet / laptop │ - Red biohazard waste container       │
│ - Uncontaminated pens and uniforms    │ - Dedicated 'dirty decontam tray'     │
└───────────────────────────────────────┴───────────────────────────────────────┘
                                    │ Inside Residential Domicile
                                    ▼
┌───────────────────────────────────────────────────────────────────────────────┐
│ IN-HOME CLEAN FIELD SETUP                                                     │
│ 1. Identify hard, stable, non-porous surface (kitchen table, counter).        │
│ 2. Unfold fluid-impervious disposable barrier pad (chux) with plastic backing │
│    downward and absorbent pad facing up.                                      │
│ 3. Place jump bag / diagnostic equipment strictly on top of barrier pad.     │
│ 4. NEVER place bags on carpet, upholstered chairs, or beds!                   │
└───────────────────────────────────────────────────────────────────────────────┘

Setting Up a Clean Field in the Home

1. Surface Selection: Never set jump kits, medication bags, or sterile supplies directly on upholstered couches, fabric armchairs, unmade beds, or carpeted floors. These porous surfaces harbor microscopic bioburdens, dust mites, pet dander, and bedbug eggs.
2. Barrier Deployment: Select a firm, hard surface (kitchen table, solid unvarnished countertop). Wipe the surface clean or lay down a fresh, fluid-impervious disposable barrier drape (such as a poly-backed chux pad, plastic side facing down). Place all diagnostic tools, supply rolls, and medication bags solely within the boundaries of this clean barrier.
3. Kit Management: Open the jump bag using clean hands or freshly donned gloves. Retrieve only the items needed for the specific clinical task. If an item inside the bag is touched with soiled gloves, the interior compartment must undergo comprehensive terminal decontamination upon return to base.
4. Post-Visit Decontamination: Prior to packing equipment back into the mobile vehicle, wipe all exterior surfaces of used diagnostic equipment (stethoscope, blood pressure cuff, oximeter, tablet case) with an EPA-registered hospital wipe, allowing full wet dwell time to elapse on the barrier pad before stowing in the vehicle.

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Safe Sharps Handling & Post-Exposure Prophylaxis (PEP)

Occupational exposure to bloodborne pathogens (Human Immunodeficiency Virus [HIV], Hepatitis B Virus [HBV], and Hepatitis C Virus [HCV]) via percutaneous needlesticks or mucosal splashes represents an ever-present occupational hazard for Community Paramedics operating in constrained, low-light residential quarters.

Sharps Safety Rules (OSHA 29 CFR 1910.1030)

• Never Recap Needles Using Two Hands: Two-handed recapping is the leading cause of accidental percutaneous occupational injury. If recapping is unavoidable in an extreme emergency, clinicians must utilize the one-handed scoop technique (sliding the needle tip into a flat cap on a table without touching the cap until it covers the bevel).
• Engineered Safety Devices: Activate needle safety mechanisms (spring-loaded needle retraction, locking protective shields, blunting cannulas) immediately upon withdrawal from the patient's skin before moving the hand.
• Point-of-Use Disposal: Sharps must be discarded immediately into a rigid, puncture-resistant, leak-proof container bearing the universal biohazard symbol. Never fill sharps containers past the 'Full' fill line (three-quarters / 75% capacity). Community Paramedics must carry a compact, vehicle-secured portable sharps container into every home where venipuncture, fingerstick capillary glucose testing, or subcutaneous injections are anticipated.

POST-EXPOSURE MANAGEMENT TIMELINE & WORKFLOW
┌─────────────────────────────────────────────────────────────────────────┐
│ MINUTE 0–5: IMMEDIATE DECONTAMINATION                                  │
│ - Percutaneous: Wash immediately with soap and copious running water.    │
│ - Mucosal Splash: Flush eyes/mouth with sterile saline or water 15 min. │
│ - CRITICAL: Do NOT squeeze/milk wound; do NOT apply bleach or alcohol! │
└────────────────────────────────────┬────────────────────────────────────┘
                                     │
                                     ▼
┌─────────────────────────────────────────────────────────────────────────┐
│ MINUTE 15–60: REPORTING & SOURCE PATIENT INVESTIGATION                  │
│ - Notify EMS supervisor / Occupational Health Exposure Officer.         │
│ - Obtain voluntary consent for rapid testing on source patient:         │
│   Rapid HIV Ag/Ab combo, HBsAg, HCV antibody.                          │
└────────────────────────────────────┬────────────────────────────────────┘
                                     │
                                     ▼
┌─────────────────────────────────────────────────────────────────────────┐
│ HOUR 0–2 (MAX 72 HOURS): POST-EXPOSURE PROPHYLAXIS (PEP)                │
│ - Golden Window: Initiate within 2 hours of exposure for peak efficacy. │
│ - Hard Cutoff: PEP is NOT recommended if initiated > 72 hours post-exp. │
│ - 3-Drug Regimen for 28 Days (e.g., Tenofovir DF + Emtricitabine +      │
│   Dolutegravir or Raltegravir).                                         │
│ - Baseline serology on clinician: HIV, HBV surface Ab, HCV Ab, Cr/LFTs.│
└────────────────────────────────────┬────────────────────────────────────┘
                                     │
                                     ▼
┌─────────────────────────────────────────────────────────────────────────┐
│ WEEKS 6, 12, AND 24: SEROLOGICAL MONITORING & SURVEILLANCE              │
│ - Repeat 4th generation HIV Ag/Ab test at 6 weeks and 4 months.        │
│ - HCV RNA testing at 4–6 weeks if source HCV-positive.                  │
│ - Verify HBV immunity; administer HBIG + booster vaccine if non-immune. │
└─────────────────────────────────────────────────────────────────────────┘

Bloodborne Pathogen Transmission Risks & PEP Protocols

The estimated average risk of seroconversion following a percutaneous exposure to infected blood:

• Hepatitis B (HBV): 6% to 30% in non-vaccinated individuals. If the exposed clinician has documented vaccination with protective anti-HBs titers (>= 10 mIU/mL), risk is essentially zero and no PEP is required. If non-immune, administer Hepatitis B Immune Globulin (HBIG) and initiate the vaccine series within 24 hours.
• Hepatitis C (HCV): 1.8% (range 0.1% to 10%). Currently, no approved post-exposure prophylaxis (neither immunoglobulin nor antivirals) exists for HCV! Management consists of baseline testing, follow-up HCV RNA PCR testing at 4 to 6 weeks, and direct-acting antiviral (DAA) therapy if chronic infection develops.
• HIV: 0.3% (1 in 300) for percutaneous needlesticks; 0.09% (1 in 1,000) for mucous membrane splashes.

HIV Post-Exposure Prophylaxis (PEP) Specifics

• Timing: Every hour counts. Prophylaxis should be initiated as soon as possible—ideally within 1 to 2 hours post-exposure. Studies demonstrate that animal models fail to establish protection if PEP is delayed beyond 72 hours; therefore, PEP is not recommended if initiated > 72 hours after exposure.
• Regimen: A standard 3-drug antiretroviral regimen taken for 28 consecutive days. The preferred regimen is typically Tenofovir Disoproxil Fumarate (TDF) 300 mg daily + Emtricitabine (FTC) 200 mg daily (combined as Truvada) PLUS an integrase strand transfer inhibitor (INSTI): Dolutegravir (Tivicay) 50 mg daily or Raltegravir (Isentress) 400 mg twice daily.
• Clinician Baseline Testing: HIV antigen/antibody test, serum creatinine, and liver transaminases prior to initiating PEP to establish baseline renal and hepatic function.

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Step-by-Step Worked Clinical Scenario

Setting: A Community Paramedic is conducting an initial post-hospitalization visit on a 68-year-old male with severe peripheral vascular disease who was discharged 48 hours ago following surgical debridement of a left heel ulcer. Hospital records indicate the ulcer is colonized with Methicillin-resistant Staphylococcus aureus (MRSA), and the discharge summary notes the patient experienced persistent hospital-acquired diarrhea with positive Clostridioides difficile toxin PCR testing.

Clinical & Operational Execution

1. Pre-Entry Risk Assessment & PPE Planning:
   • The clinician recognizes two distinct transmission threats: MRSA wound colonization (requires Contact Precautions) and C. difficile diarrhea (requires strict Spore-Specific Contact Precautions).
   • The paramedic confirms that alcohol-based hand rub is ineffective against C. difficile bacterial endospores and ensures a sink with running water and antibacterial soap is accessible in the home.
2. Clean Field Deployment:
   • Entering the residence, the paramedic bypasses the living room's fabric sofa and shag rug.
   • In the kitchen, the paramedic cleans a wooden dining table, lays down a fluid-impervious disposable barrier pad (chux, plastic side down), and places the diagnostic and wound care kit onto the pad.
3. PPE Donning Sequence:
   • The paramedic performs hand hygiene, dons a clean fluid-resistant isolation gown, fastening both neck and waist ties securely.
   • The clinician dons nitrile examination gloves, pulling the wrist cuffs completely over the elastic gown sleeves to ensure an impermeable seal.
4. Clinical Care Execution:
   • The left heel dressing is removed and inspected. Purulent drainage is cultured using aseptic technique, and the ulcer is irrigated with sterile saline. Soiled dressings are placed directly into a sealable plastic biohazard pouch on the floor adjacent to the footrest.
   • The wound is redressed with a silver alginate barrier and secure wrap.
5. Doffing, Hand Hygiene & Equipment Disinfection:
   • The paramedic removes gloves using the glove-in-glove technique and rolls the gown forward and inside-out, bundling the contaminated items into the biohazard bag.
   • Hand Hygiene: Because C. difficile spores are physically present in the patient's environment, the paramedic proceeds directly to the bathroom sink and washes hands vigorously with liquid soap and running water for 30 seconds, using friction to mechanically strip spores from the dermal epidermis. Hands are dried with a paper towel, which is then used to turn off the faucet.
   • Disinfection: Non-critical diagnostic tools (pulse oximeter probe, blood pressure cuff, stethoscope) are wiped down using EPA-registered sodium hypochlorite (bleach) wipes. The paramedic verifies that the surfaces remain glistening wet for the full 4-minute dwell time on the disposable barrier pad before placing the devices back into the vehicle-bound mobile kit.
   • The disposable barrier pad is folded inward on itself, discarded into the red biohazard bag, sealed, and carried to the vehicle's locked external waste compartment.

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Common Exam Traps & Avoidance Strategies

1. Using Alcohol Rub for Clostridioides difficile: Alcohol-based hand sanitizers denature bacterial cell membranes and viral capsids, but they cannot penetrate or kill the keratin-like protein shell of C. difficile bacterial endospores. Selecting hand sanitizer instead of mechanical soap-and-water washing on the CP-C exam is a classic failure trap.
2. Towel-Drying Disinfectant Wipes: Wiping off wet chemical disinfectants with paper towels or gauze immediately after application disrupts the chemical dwell time and prevents pathogen inactivation. The liquid must remain visibly wet for the entire manufacturer-specified kill time.
3. Putting Jump Kits on Carpet or Furniture: Placing canvas medical bags on residential carpeting or upholstered recliners violates clean barrier protocols and risks importing bedbugs, scabies, or multi-drug resistant organisms into the next patient's residence.
4. Recapping Sharps with Two Hands: Never select an option that involves two-handed needle recapping. The only permissible recapping technique is the one-handed scoop method when safety-engineered alternatives are unavailable.
5. Delaying HIV PEP Beyond 72 Hours: Prophylaxis must be started as soon as possible, ideally within 2 hours. If a question presents an exposure that occurred 4 or 5 days prior, initiating PEP is no longer recommended because viral integration into host cellular DNA is already complete.