What do chickenpox spots look like when they first appear?

At first, the rash looks like pinkish dots that quickly develop a small blister on top (a blister is a bump on your skin that fills up with fluid). After about 24 to 48 hours, the fluid in the blisters gets cloudy and the blisters begin to crust over. Chickenpox blisters show up in waves.

What is the contagious stage of varicella?

A person with varicella is considered contagious beginning one to two days before rash onset until all the chickenpox lesions have crusted. Vaccinated people may develop lesions that do not crust. These people are considered contagious until no new lesions have appeared for 24 hours.

What do chicken pox look like in a vaccinated child?

A child who has had the chickenpox vaccine will have far fewer lesions. The blister is usually described as looking like a dewdrop on a rose petal. The blister area (vesicle) is thin-walled and easily broken. Blisters become cloudy and then crust over, with healing completed within 1–3 weeks.

How contagious is varicella-zoster virus?

Varicella is highly contagious. It is less contagious than measles, but more so than mumps and rubella. Secondary attack rates among susceptible household contacts of persons with varicella are as high as 90% (that is, 9 of 10 susceptible household contacts of persons with varicella will become infected).

What are the signs and symptoms of varicella?

They can have an atypical varicella rash with more lesions, and they can be sick longer than immunocompetent people who get varicella. New lesions may continue to develop for more than 7 days, may appear on the palms and soles, and may be hemorrhagic. People with HIV or AIDS

What virus causes varicella?

Varicella is an acute infectious disease caused by varicella-zoster virus (VZV). Primary varicella infection (chickenpox) was not reliably distinguished from smallpox until the end of the 19th century. In 1875, Rudolf Steiner demonstrated that chickenpox was caused by an infectious agent by inoculating

Who is at risk for severe varicella?

People at High Risk for Severe Varicella. People at risk for severe varicella include: Immunocompromised people who get varicella are at risk of developing visceral dissemination (VZV infection of internal organs) leading to pneumonia, hepatitis, encephalitis, and disseminated intravascular coagulopathy.