The varicella vaccine protects against chickenpox (varicella), a common and very contagious childhood viral illness.
The varicella vaccine is given by injection when kids are between 12 and 15 months old. They receive a booster shot for further protection at 4 to 6 years of age.
Kids who are older than 6 but younger than 13 who have not had chickenpox also may receive the vaccine, with the two doses given at least 3 months apart.
Kids 13 years or older who have not had either chickenpox or the vaccine need two vaccine doses at least 1 month apart.
Why the Vaccine Is Recommended
The varicella vaccine prevents severe illness in almost all kids who are immunized. It's up to 85% effective in preventing mild illness. Vaccinated kids who do get chickenpox generally have a mild case.
Possible mild effects are tenderness and redness where the shot was given, fever, fatigue, and a varicella-like illness. There is a very small chance of an allergic reaction with any vaccine.
A rash can occur up to 1 month after the injection. It may last for several days but will disappear on its own without treatment. There is a very small risk of febrile seizures after vaccination.
When to Delay or Avoid Immunization
The vaccine is not recommended if:
- your child is currently sick, although simple colds or other minor illnesses should not prevent immunization
- your child has had an allergic reaction to gelatin or to the antibiotic neomycin that required medical treatment
Talk to your doctor about whether being vaccinated is a good idea if your child:
- had a severe allergic reaction to a previous dose of varicella vaccine
- has recently received gamma globulin or a blood transfusion
- has a disorder that affects the immune system (such as cancer); is taking prednisone, steroids, or other immunosuppressive drugs; or is undergoing chemotherapy or radiation therapy
Your doctor may determine that the benefits of vaccinating your child outweigh the potential risks.
Pregnant women should not receive the chickenpox vaccine until after childbirth.
Caring for Your Child After Immunization
Pain and fever can be treated with acetaminophen or ibuprofen. Check with your doctor to see if you can give either medication and to find out the appropriate dose.
When to Call the Doctor
Call your doctor if:
- you aren't sure if the vaccine should be postponed or avoided
- there are problems after the immunization
Reviewed by: Elana Pearl Ben-Joseph, MD
Date reviewed: February 2015
|CDC: Vaccines & Immunizations The CDC's site has information on vaccines, including immunization schedules, recommendations, FAQs, and more.|
|Immunization Action Coalition This organization is a source of childhood, adolescent, and adult immunization information as well as hepatitis B educational materials.|
|CDC: Preteen and Teen Vaccines CDC site provides materials in English and Spanish for parents, teens, preteens, and health care providers about vaccines and the diseases they prevent.|
|First Aid: Chickenpox Chickenpox (varicella) has become less common in the U.S. due to the chickenpox vaccine, but it can easily spread from one person to another.|
|Immunization Schedule Which vaccines does your child need to receive and when? Use this immunization schedule as a handy reference.|
|Your Child's Immunizations Immunizations protect your child from potentially fatal diseases. Find out what vaccines your child needs to grow up healthy.|
|Shingles Shingles isn't very common in kids - it mostly affects older people. Find out what causes shingles, symptoms to watch for, and what to do if your child has it.|
|Chickenpox It's most common in kids under age 12, but anyone can get chickenpox. The good news is that a vaccine can prevent most cases.|
Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.
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