Yes, you can still get chickenpox even if you’re vaccinated, but it’s uncommon and usually much milder than “normal” chickenpox.

Can you get chicken pox if you are vaccinated?

Quick Scoop

  • The varicella (chickenpox) vaccine is highly effective but not 100%.
  • A small number of vaccinated people can still get what’s called breakthrough chickenpox.
  • Breakthrough cases are typically mild: fewer spots, lower or no fever, faster recovery.
  • Two doses give much stronger and longer-lasting protection than one dose.
  • Even if you do get it after vaccination, the risk of serious complications is dramatically reduced.

What is “breakthrough” chickenpox?

“Breakthrough chickenpox” means getting chickenpox more than about six weeks after being vaccinated.

Typical features:

  • Fewer than 50 spots or blisters (vs 200–500 in unvaccinated cases).
  • Rash may be faint, sometimes looks like bug bites or a mild rash.
  • Little or no fever, and you usually feel less sick overall.
  • Illness lasts fewer days than classic chickenpox.

Studies show roughly about 1 in 10 vaccinated children may ever develop a mild breakthrough infection after exposure, meaning about 90% never get sick at all, and severe disease is essentially prevented.

How often does this happen?

  • Real‑world effectiveness of the chickenpox vaccine is about 85–90% for any disease and around 100% for preventing severe disease.
  • A large US review found chickenpox cases dropped about 97% after the vaccine and its booster were introduced.
  • Breakthrough cases remain relatively rare and usually mild, even when they occur in adults decades after vaccination.

So: no vaccine gives zero risk, but the odds of bad chickenpox after vaccination are very low.

One dose vs. two doses

Guidelines recommend two doses of varicella vaccine for best protection.

  • Children: first dose at 12–15 months, second at 4–6 years.
  • Teens and adults who never had chickenpox: two doses at least 4 weeks apart.

People who only received one dose are more likely to:

  • Get breakthrough chickenpox at some point.
  • Have more spots and stronger symptoms than those with two doses (though still usually milder than unvaccinated infection).

If you get chickenpox after the vaccine, is it serious?

For most healthy vaccinated people, it’s much less serious than classic chickenpox.

Vaccinated people who get breakthrough infection:

  • Are very unlikely to develop pneumonia, brain inflammation, or life‑threatening complications.
  • Recover faster and often don’t need more than home care.

However, chickenpox can still be dangerous for:

  • Newborns and infants
  • Pregnant people
  • People with weakened immune systems
  • Some adults and teens, especially if unvaccinated

Even a mild breakthrough case is contagious , so people with a rash should stay home until no new spots have appeared for at least 24 hours and existing lesions are crusting over.

What this means for you (practical takeaways)

  • If you’re fully vaccinated (two doses), your risk of ever getting chickenpox is low, and severe disease is extremely unlikely.
  • If you only had one dose or are unsure:
    • You can ask your doctor about a second dose or a blood test to check immunity.
  • If you develop a new itchy blistering rash and you’ve been around someone with chickenpox or shingles, you should contact a healthcare provider to confirm what it is and what to do next.

Forum-style note & “trending topic” angle

Questions like “can you get chicken pox if you are vaccinated” come up often on parenting forums and vaccine discussion boards, where people compare stories of never getting sick versus having a mild breakthrough in adulthood. In 2025 and into early 2026, the broader context of vaccine talk online still mixes real experiences with myths—one common myth is “everyone will get chickenpox eventually no matter what,” which isn’t supported by the effectiveness data for the varicella vaccine.

“I was vaccinated as a kid and my blood test still shows immunity years later—do I have to get chickenpox someday?” The best evidence so far says: no, many vaccinated people never get it at all, and those who do usually experience only a mild version.

Quick HTML FAQ table

html

<table>
  <thead>
    <tr>
      <th>Question</th>
      <th>Short answer</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Can you get chicken pox if you are vaccinated?</td>
      <td>Yes, but it is uncommon and usually mild (breakthrough chickenpox).</td>
    </tr>
    <tr>
      <td>Does two-dose vaccination help?</td>
      <td>Yes, it greatly reduces the chance of any disease and prevents severe cases.</td>
    </tr>
    <tr>
      <td>Are breakthrough cases contagious?</td>
      <td>Yes, you can still spread the virus and should isolate until the rash stops spreading.</td>
    </tr>
    <tr>
      <td>Do vaccinated people still get serious complications?</td>
      <td>Very rarely; the vaccine is highly protective against severe disease.</td>
    </tr>
  </tbody>
</table>

TL;DR: You can get chickenpox after being vaccinated, but it tends to be a mild “breakthrough” infection, and two doses of vaccine offer strong, long‑lasting protection against both getting sick at all and, especially, against severe disease.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.