Condition
Chickenpox clinical trials and research
As of November 12, 2026, Find a Trial lists 4 Chickenpox clinical trials that are recruiting, at sites in 18 countries (most in Estonia (3), Poland (3), United States (3)). By phase: Phase 3 (4). Every study is explained in plain English. Data from ClinicalTrials.gov and NIH RePORTER, updated November 12, 2026.
- 4Clinical trials
- 18Countries
Newest Chickenpox clinical trials
| Study | Phase | Where | Status | Registered |
|---|---|---|---|---|
| Immune response and safety of an investigational chickenpox vaccine and MMR given by muscle injection to healthy 12–15 month-olds | Phase 3 | Tucson, Arizona and 21 other locations | Recruiting | Mar 3, 2025 |
| Second-dose chickenpox vaccine given three months after the first dose for 12–15 month olds | Phase 3 | Salvaleón de Higüey, La Altagracia Province and 5 other locations | Recruiting | Feb 3, 2025 |
| Investigating a new chickenpox vaccine for healthy children aged 12 to 15 months | Phase 3 | Mobile, Alabama and 96 other locations | Recruiting | Dec 18, 2024 |
| Safety assessment of a new chickenpox vaccine for young children | Phase 3 | Phoenix, Arizona and 45 other locations | Recruiting | Nov 18, 2024 |
All recruiting trials (4)
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Immune response and safety of an investigational chickenpox vaccine and MMR given by muscle injection to healthy 12–15 month-olds
This trial will test whether GSK's investigational chickenpox vaccine given with MMR as a muscle shot is safe and produces a good immune response in healthy children aged 12 to 15 months, compared with Merck's chickenpox vaccine given under the skin.
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Second-dose chickenpox vaccine given three months after the first dose for 12–15 month olds
This test checks whether GSK’s investigational chickenpox vaccine is safe and produces a strong immune response as the second dose when given to healthy children three months after their first dose at age 12–15 months.
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Investigating a new chickenpox vaccine for healthy children aged 12 to 15 months
This study is testing a new chickenpox vaccine in healthy kids aged 12 to 15 months to see if it works well and is safe compared to an existing vaccine.
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Safety assessment of a new chickenpox vaccine for young children
This study tests a new chickenpox vaccine in healthy kids aged 12 to 15 months to see if it's safe compared to the already approved vaccine.
Quick answers
How many Chickenpox clinical trials are recruiting right now?
4, as of November 12, 2026. We update this list each time we refresh our data from ClinicalTrials.gov.
Where are these trials running?
In 18 countries. The most sites are in Estonia (3 trials), Poland (3 trials), United States (3 trials), Belgium (2 trials), Dominican Republic (2 trials). Each study page lists its sites and which ones are recruiting.
What phases are they in?
Phase 3: 4. Trials with no phase listed are usually device, behavioural or observational studies.
How do I join one?
Open a study, check the "Is this trial a fit for you?" section, then contact the study team listed on the page. They will ask a few screening questions. Asking is free and does not commit you to anything. Talk it over with your doctor first.
Find the studies that fit you
A list is a starting point. Tell us your situation in your own words and we'll rank the studies that match and explain why. It's free and needs no account.