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Varicella (Chickenpox)

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Chickenpox is a very contagious disease caused by the varicella-zoster virus (VZV). It causes a blister-like rash, itching, tiredness, and fever. The rash appears first on the stomach, back and face and can spread over the entire body causing between 250 and 500 itchy blisters. Chickenpox can be serious, especially in babies, adults, and people with weakened immune systems. The best way to prevent chickenpox is to get the chickenpox vaccine.

  • Symptoms
  • Transmission
  • Prevention

Symptoms include:

  • Blister-like rash
  • Fever that lasts about 4 to 6 days
  • Itching
  • Tiredness

Certain groups of people are more likely to have more severe illness with serious complications. These include adult, infants, adolescents, pregnant women, and people have a weakened immune system. If anyone develops symptoms that look like chickenpox, contact your health care provider.

It is spread from person to person by direct contact or through the air from an infected person’s coughing and sneezing. Chickenpox can be spread for 1-2 days before rash starts and until all blisters are crusted or no new lesions appear within a 24-hour period. It takes between 10-21 days after contact with an infected person for someone to develop chickenpox.  

If I have been vaccinated, can I still get chickenpox?
Yes. About 15%–20% of people who have received one dose of chickenpox vaccine do still get chickenpox if they are exposed, but their disease is usually mild.   Two doses of varicella vaccine are now routinely recommended. The first dose can be given at 12 months of age and the second dose between 4-6 years of age.

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