Chickenpox, medically known as varicella, is a highly contagious viral illness caused by the varicella-zoster virus (VZV). It primarily affects children, leaving them with lifelong immunity after recovery. The virus spreads easily through the air via respiratory droplets when an infected person coughs or sneezes. Direct contact with the fluid inside the characteristic skin blisters also transmits the infection. A person with chickenpox can spread the virus even before their rash appears, usually one to two days before blisters develop, making early isolation challenging in community settings across Nigeria.
Once the varicella-zoster virus enters the human body through the upper respiratory tract, it replicates locally in the regional lymph nodes. A primary viremia carries the virus to internal organs like the liver and spleen for further multiplication. A secondary viremia then seeds the virus into the skin and mucous membranes, producing the classic vesicular rash. After the primary infection resolves, the virus retreats into sensory nerve ganglia, where it stays dormant for decades.
The clinical course of chickenpox begins with mild prodromal symptoms such as low-grade fever, malaise, and loss of appetite, particularly in older children and adults. Within a day or two, the hallmark pruritic rash appears.
A defining feature of chickenpox is the presence of lesions in various stages of development simultaneously on the body.
Management of uncomplicated chickenpox focuses on relieving discomfort and preventing secondary bacterial infections of the skin.
Vaccination remains the most effective defense against chickenpox. The live-attenuated varicella vaccine provides strong, long-lasting protection for children and susceptible adults. Vaccinated individuals who still contract the virus typically experience a very mild form of the disease with fewer lesions and little to no fever. In healthcare and community settings, isolating infected individuals until all lesions have crusted over prevents widespread outbreaks among vulnerable populations, such as pregnant women and immunocompromised patients.
Protecting vulnerable clients in maternity wards and pediatric clinics is a critical duty for midwives. Varicella infection during early pregnancy can lead to congenital varicella syndrome, while infection near delivery can cause severe neonatal chickenpox. Midwives must screen pregnant women for immunity and ensure strict airborne and contact precautions when an infected patient enters a health facility. Susceptible staff members should not care for patients with active chickenpox to prevent nosocomial spread.