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They protect against different illnesses and are not substitutes for each other. The chickenpox (varicella) vaccine helps prevent a first varicella infection, while Shingrix helps prevent shingles in recommended adults. In U.S. CDC guidance, routine varicella vaccination is for children and people without evidence of immunity; Shingrix is recommended for adults 50 and older and for adults 19 and older who are or will be immunocompromised.
How the vaccines differ
Chickenpox and shingles are caused by the same virus, varicella-zoster virus. Chickenpox is the initial illness. After recovery, the virus can remain dormant in the body and reactivate years later as shingles.
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Varicella vaccine is intended to prevent chickenpox in people who lack evidence of immunity. Shingrix, the recombinant zoster vaccine, is intended to prevent shingles and related complications in recommended adult groups. CDC explicitly says Shingrix is not indicated to prevent chickenpox. CDC: shingles vaccination; CDC: adult immunization schedule.
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Who needs the chickenpox vaccine?
CDC recommends varicella vaccination for people without evidence of immunity. The schedule depends on age and prior doses.
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Children
Children should receive two doses: the first at 12–15 months and the second at 4–6 years. CDC names Varivax as a single-antigen product and ProQuad, a combination vaccine, for children aged 12 months through 12 years. CDC: chickenpox vaccination.
Adolescents and adults without immunity
People aged 13 or older who lack evidence of immunity and have never had chickenpox or received varicella vaccine generally need two doses. CDC’s public guidance specifies at least 28 days between doses; its healthcare-professional guidance describes a 4–8-week interval. If a person received one dose previously, CDC recommends completing the series with a second dose. CDC: varicella vaccine recommendations.
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What counts as evidence of immunity?
CDC criteria include age-appropriate documentation of vaccination, laboratory evidence of immunity, or a provider-verified history of chickenpox or shingles. Birth in the United States before 1980 is a criterion for many people, but not for healthcare personnel, pregnant women, or immunocompromised people.
Commercial antibody tests can be falsely negative after vaccination. A negative result therefore does not necessarily establish that someone lacks vaccine-induced immunity; have a clinician interpret testing in context. CDC: varicella vaccine recommendations.
When varicella vaccine may not be appropriate
Varicella vaccine is live attenuated. Pregnancy or the possibility of pregnancy, as well as certain immune-affecting conditions or treatments, can mean a person should not receive it or should wait. Eligibility and timing depend on the individual’s circumstances and should be reviewed with a healthcare professional. CDC: chickenpox vaccination.
CDC says two doses are about 90% effective at preventing chickenpox. CDC: varicella vaccine recommendations (page dated 2024).
Who should get the shingles vaccine?
CDC recommends two doses of Shingrix for adults aged 50 or older, whether or not they remember having chickenpox or report a past shingles episode. It also recommends two doses for adults aged 19 or older who are or will be immunodeficient or immunosuppressed because of disease or therapy. CDC: shingles vaccination; CDC: clinical considerations for Shingrix.
Shingrix timing and missed intervals
The usual interval is 2–6 months between doses. Some immunocompromised adults who would benefit from finishing sooner may receive dose two after 1–2 months. If more than six months have passed since the first dose, CDC says to give the second dose as soon as possible rather than restarting the series. CDC: clinical considerations for Shingrix.
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Past chickenpox, shingles, or vaccination
Eligible adults should still receive Shingrix if they previously had shingles, received chickenpox vaccine, or got the older Zostavax vaccine. Zostavax is no longer available in the United States. A history of chickenpox vaccination does not replace Shingrix when an adult meets CDC’s shingles-vaccine recommendation. CDC: shingles vaccination.
When to wait or avoid Shingrix
CDC advises against Shingrix during a current shingles episode and after a severe allergic reaction to a component or a prior dose. If someone is currently pregnant, CDC advises waiting; after shingles, the rash should have resolved before vaccination. A healthcare professional can assess timing and contraindications. CDC: shingles vaccination; CDC: clinical considerations for Shingrix.
CDC estimates that about 1 in 3 people in the United States will have shingles during their lifetime. It reports that Shingrix is over 90% effective at preventing shingles and postherpetic neuralgia in adults aged 50 or older with healthy immune systems. CDC: shingles vaccination (page dated 2025).
At a glance: purpose, products, and schedules
| Question | Chickenpox (varicella) vaccine | Shingles (zoster) vaccine |
|---|---|---|
| Purpose | Prevent chickenpox in people without evidence of immunity. | Prevent shingles and related complications in recommended adults. |
| U.S. products named by CDC | Varivax (single-antigen); ProQuad (MMRV combination) for children aged 12 months through 12 years. | Shingrix (recombinant zoster vaccine); Zostavax is no longer available in the United States. |
| Recommended groups | Children and susceptible adolescents or adults. | Adults aged 50 or older; adults aged 19 or older who are or will be immunocompromised. |
| Typical schedule | Children: 12–15 months and 4–6 years. Susceptible people aged 13 or older: two doses at least 28 days apart. | Two doses, usually 2–6 months apart; some immunocompromised adults may use a 1–2-month interval. |
| Effect of past chickenpox or vaccination | A verified history or age-appropriate vaccine documentation may count as evidence of immunity. | Eligible adults are recommended to get Shingrix even if they had chickenpox or received varicella vaccine. |
| Key eligibility issue | Live vaccine; pregnancy and certain immune conditions or treatments can affect eligibility. | Does not prevent chickenpox; current shingles, severe allergy, and pregnancy affect timing or eligibility. |
Which vaccine should you ask about?
- For a child or someone who may never have had chickenpox or its vaccine: ask a healthcare professional to review varicella vaccination and evidence of immunity.
- For an adult aged 50 or older: ask about the two-dose Shingrix series, even if you had chickenpox or shingles before.
- For an adult aged 19 or older with immune suppression or planned immune-affecting treatment: ask about Shingrix timing and whether varicella vaccination is appropriate. The vaccines are not interchangeable, and the live varicella vaccine may be unsuitable for some people in this group.
- If your records are incomplete or you are pregnant, may be pregnant, or have a complex medical history: have a clinician review your specific eligibility and timing rather than relying on age or a test result alone.
These are U.S. CDC recommendations; other jurisdictions may differ, and CDC guidance can be updated. The cited CDC pages were accessed October 4, 2026.
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