Chickenpox (varicella) vaccine - what you need to know
All content below is taken in its entirety from the CDC Chickenpox Vaccine Information Statement (VIS):
Chickenpox, also called varicella, is an acute viral disease. It is caused by the varicella-zoster virus. Symptoms include fever, general malaise, and a rash which begins with small reddish bumps (papules) that quickly fill with fluid to form small blisters (vesicles).
Vaccines are used to boost your immune system and prevent many diseases, some of which are serious or life-threatening. Vaccines “teach“ your body how to defend itself when germs, such as viruses or bacteria, invade it. After exposure to the vaccine, your immune system learns to recognize and attack the viruses or bacteria if you are exposed to them later in life. As a result, you will not become ill. Or, if you do get the illness, you will likely have a milder infection. Vaccines are very safe and very effective at protecting against certain serious diseases.
Information
Why get vaccinated?
Varicella vaccine can prevent varicella.
Varicella, also called "chickenpox," causes an itchy rash that usually lasts about a week. It can also cause fever, tiredness, loss of appetite, and headache. It can lead to skin infections, pneumonia, inflammation of the blood vessels, swelling of the brain and/or spinal cord covering, and infections of the bloodstream, bone, or joints. Some people who get chickenpox get a painful rash called "shingles" (also known as herpes zoster) years later.
Chickenpox is usually mild, but it can be serious in infants under 12 months of age, adolescents, adults, pregnant people, and people with a weakened immune system. Some people get so sick that they need to be hospitalized. It doesn't happen often, but people can die from chickenpox.
Most people who are vaccinated with 2 doses of varicella vaccine will be protected for life.
Varicella vaccine
Children need 2 doses of varicella vaccine, usually:
- First dose: age 12 through 15 months
- Second dose: age 4 through 6 years
Older children, adolescents, and adults also need 2 doses of varicella vaccine if they are not already immune to chickenpox.
Varicella vaccine may be given at the same time as other vaccines. Also, a child between 12 months and 12 years of age might receive varicella vaccine together with MMR (measles, mumps, and rubella) vaccine in a single shot, known as MMRV. Your health care provider can give you more information.
Talk with your health care provider
Tell your vaccination provider if the person getting the vaccine:
- Has had an allergic reaction after a previous dose of varicella vaccine, or has any severe, life-threatening allergies
- Is pregnant or thinks they might be pregnant -- pregnant people should not get varicella vaccine
- Has a weakened immune system, or has a parent, brother, or sister with a history of hereditary or congenital immune system problems
- Is taking salicylates (such as aspirin)
- Has recently had a blood transfusion or received other blood products
- Has tuberculosis
- Has gotten any other vaccines in the past 4 weeks
In some cases, your health care provider may decide to postpone varicella vaccination until a future visit.
People with minor illnesses, such as a cold, may be vaccinated. People who are moderately or severely ill should usually wait until they recover before getting varicella vaccine.
Your health care provider can give you more information.
Risks of a vaccine reaction
- Sore arm from the injection, redness or rash where the shot is given, or fever can happen after varicella vaccination.
- More serious reactions happen very rarely. These can include pneumonia, infection of the brain and/or spinal cord covering, or seizures that are often associated with fever.
- In people with serious immune system problems, this vaccine may cause an infection that may be life-threatening. People with serious immune system problems should not get varicella vaccine.
It is possible for a vaccinated person to develop a rash. If this happens, the varicella vaccine virus could be spread to an unprotected person. Anyone who gets a rash should stay away from infants and people with a weakened immune system until the rash goes away. Talk with your health care provider to learn more.
Some people who are vaccinated against chickenpox get shingles (herpes zoster) years later. This is much less common after vaccination than after chickenpox disease.
People sometimes faint after medical procedures, including vaccination. Tell your provider if you feel dizzy or have vision changes or ringing in the ears.
As with any medicine, there is a very remote chance of a vaccine causing a severe allergic reaction, other serious injury, or death.
What if there is a serious problem?
An allergic reaction could occur after the vaccinated person leaves the clinic. If you see signs of a severe allergic reaction (hives, swelling of the face and throat, difficulty breathing, a fast heartbeat, dizziness, or weakness), call 9-1-1 and get the person to the nearest hospital.
For other signs that concern you, call your health care provider.
Adverse reactions should be reported to the Vaccine Adverse Event Reporting System (VAERS). Your health care provider will usually file this report, or you can do it yourself. Visit the VAERS website at
The National Vaccine Injury Compensation Program.
The National Vaccine Injury Compensation Program (VICP) is a federal program that was created to compensate people who may have been injured by certain vaccines. Claims regarding alleged injury or death due to vaccination have a time limit for filing, which may be as short as two years. Visit the VICP website at
How can I learn more?
- Ask your health care provider.
- Call your
local or state health department . - Visit the website of the Food and Drug Administration (FDA) for vaccine package inserts and additional information at
www.fda.gov/vaccines-blood-biologics/vaccines .
Contact the Centers for Disease Control and Prevention (CDC):
- Call 1-800-232-4636 (1-800-CDC-INFO) or
- Visit CDC's website at
www.cdc.gov/vaccines .
References
Centers for Disease Control and Prevention website. Vaccine information statements (VISs): Varicella (chickenpox) vaccine: What you need to know.
Version Info
Last reviewed on: 7/8/2023
Reviewed by: Linda J. Vorvick, MD, Clinical Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
