Contact Precautions for Shingles (Varicella-Zoster Virus)

Infection Control Measures for Shingles

The Centers for Disease Control and Prevention recommends that patients with shingles require airborne and contact precautions until all lesions are dry and crusted 1
For immunocompetent patients with localized herpes zoster, standard precautions with complete covering of the lesions are required 1
For patients with disseminated herpes zoster or immunocompromised patients with herpes zoster, airborne precautions and contact precautions are necessary 1
Precautions should be maintained until all lesions are dry and crusted, which typically takes 4-7 days after rash onset in immunocompetent hosts 1, 2

Only healthcare personnel with evidence of immunity to varicella should care for patients with confirmed or suspected varicella or herpes zoster, with evidence of immunity including documentation of 2 doses of varicella vaccine 1
Healthcare personnel who have received 2 doses of vaccine and are exposed to VZV should be monitored daily during days 8-21 after exposure for fever, skin lesions, and systemic symptoms 1

Transmission of varicella-zoster virus occurs through direct contact with lesions or inhalation of aerosols from vesicular fluid 2
No preventive measures are currently available to prevent shingles itself, but household contacts of susceptible individuals should be vaccinated against VZV if they have no history of chickenpox and are seronegative for HIV 3, 4

Failing to recognize that localized zoster in immunocompromised patients requires airborne and contact precautions until disseminated infection is ruled out 1
Not maintaining precautions until all lesions are completely dry and crusted 1
Allowing healthcare personnel without evidence of immunity to care for patients with shingles 1
Overlooking the potential for transmission to susceptible individuals, especially pregnant women and immunocompromised patients 2

Localized shingles is much less infectious than chickenpox or disseminated shingles, but transmission can still occur after close contact, particularly in household settings, according to the Centers for Disease Control and Prevention (CDC) 5
Household exposure represents the highest risk, with approximately 85% (range: 65-100%) of susceptible household contacts developing varicella after exposure to varicella-zoster virus, as reported by the CDC 6, 5

The CDC recommends that the child avoid direct face-to-face contact with the family member until all shingles lesions are completely dry and crusted, and defines "direct contact exposure" as face-to-face contact with an infectious person while indoors, with experts suggesting contact >5 minutes (or >1 hour by other definitions) constitutes significant exposure 6, 5
The child should not share the same room or have prolonged indoor contact with the infected family member while lesions remain active, as advised by the CDC 6, 5

Varicella-zoster immune globulin (VZIG) is NOT routinely indicated for healthy children after household exposure to localized shingles, according to the CDC 6, 5
VZIG is reserved for high-risk populations including immunocompromised children, neonates with specific maternal exposure timing, and premature infants, as recommended by the CDC 6, 5
VZIG must be administered within 96 hours of exposure to be effective, as stated by the CDC 6, 5

The risk calculation changes if the child is immunocompromised, and even brief exposure warrants consideration of VZIG prophylaxis, and avoidance becomes absolutely critical, according to the CDC 6, 5
After household exposure occurs, the attack rate is substantial, with approximately 20% risk for close contact outside the household, but up to 85% for continuous household exposure, as reported by the CDC 6, 5