Chickenpox in Infants: Risks, Complications & Prevention

While chickenpox (varicella) is usually mild in older children, infants and children under 2 years face higher complication rates.

Increased Risks in Young Children

• Pneumonia: Viral or secondary bacterial; leading cause of hospitalization.
• Encephalitis: Brain inflammation; rare but serious.
• Severe Skin Infections: Cellulitis, necrotizing fasciitis from bacterial superinfection of lesions.
• Dehydration: Oral lesions reduce fluid intake.
• Transmission Risk: Highly contagious to unvaccinated/immunocompromised contacts.

Prevention

• Vaccination: Varicella vaccine at 12–15 months (1st dose), 4–6 years (2nd dose). >90% effective.
• Post-Exposure Prophylaxis: Varicella-zoster immune globulin (VariZIG) for high-risk infants within 10 days of exposure.
• Maternal Immunity: Vaccinated/immune mothers transfer antibodies; protects newborns for first few months.

If Infection Occurs

• Antiviral (acyclovir/valacyclovir) if started early, especially for high-risk infants
• Symptomatic care: hydration, antipyretics (avoid aspirin), antipruritics
• Monitor for complications; seek urgent care for respiratory distress, lethargy, or spreading skin infection