Chickenpox Vaccine: What Is Varicella?
Varicella, commonly called chickenpox, is a highly contagious infection. It is caused by the varicella zoster virus (VZV). It produces an itchy rash. It can cause serious complications, especially in adults, newborns, or people with weak immune systems.
VZV spreads from person to person by:
- Airborne droplets of moisture that contain the virus
- Direct contact with fluid from a varicella rash
It is most contagious just after the rash has broken out. It is also contagious 1-2 days before the rash erupts and until all of the blisters have crusted.
- General feeling of discomfort
- A rash of small, flat, red spots that become raised to form round, itchy, fluid-filled blisters
It takes about 10-21 days to develop varicella after contact with an infected person. The illness lasts 5-10 days. The rash usually develops on the face and trunk.
Treatment generally focuses on reducing itchiness, such as using anti-itch cream. Antibiotics may be used for rashes that become infected. Antiviral drugs might be considered for some patients.
Varicella can lead to scarring, pneumonia, and death in severe cases.
Last reviewedDecember 2014by David L. Horn, MD, FACP
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.