Chickenpox
Recent clinical, regulatory, research and industry developments relating to this disease.
Manipulation of the Innate Immune Response by Varicella Zoster Virus.
What's happening now
An analyst briefing on current research, clinical, regulatory and industry activity surrounding this disease.
- 5 clinical trials expected to report results, the earliest in Q3 2026.
- Q3 2026A Phase 3a, Open-Label, Randomized, Controlled Study to Evaluate the Immunogenicity and Safety of Intramuscular Administration of an Investigational Varicella Vaccine and Priorix Compared With Subcutaneous Administration of Varivax and Priorix, When Given as a First Dose to Healthy Children 12 to 15 Months of Age
- Q4 2026A Phase 3a, Observer-blind, Randomized, Controlled Study to Demonstrate Lot-to-lot Consistency and Evaluate the Immunogenicity and Safety of an Investigational Varicella Vaccine Compared With Varivax, Administered as a First Dose to Healthy Children 12 to 15 Months of Age
- Q4 2026A Phase 3a, Observer-blind, Randomized, Controlled, Study to Evaluate the Immunogenicity and Safety of an Investigational Varicella Vaccine Compared With Varivax, When Given as a Second Dose to Healthy Children, 3 Months After the Administration of a First Dose at 12 to 15 Months of Age
- Q3 2027A Phase III, Double-blind, Randomized, Multicenter, Multinational, Active-controlled, Non-inferiority Study to Evaluate Immunogenicity and Safety After the First and Second Doses of MG1111 (BARYCELA Inj.) in Healthy Children Aged 12 Months to 12 Years
- Q1 2028A Phase 3a, Observer Blind, Randomized, Controlled Study to Evaluate the Immunogenicity and Safety of Intramuscular Administration of an Investigational Combined Measles, Mumps, Rubella, and Varicella Vaccine Compared With Intramuscular Administration of ProQuad When Administered as a Second Dose to Healthy Children Aged 15 Months to 6 Years of Age
Clinical MilestonesViewHide
- 2026-07-08A Phase 3a, Observer Blind, Randomized, Controlled Study to Evaluate the Immunogenicity and Safety of Intramuscular Administration of an Investigational Combined Measles, Mumps, Rubella, and Varicella Vaccine Compared With Intramuscular Administration of ProQuad When Administered as a Second Dose to Healthy Children Aged 15 Months to 6 Years of AgeResults expected Q1 2028
- 2026-05-29A Phase 3a, Observer-blind, Randomized, Controlled Study to Demonstrate Lot-to-lot Consistency and Evaluate the Immunogenicity and Safety of an Investigational Varicella Vaccine Compared With Varivax, Administered as a First Dose to Healthy Children 12 to 15 Months of AgeResults expected Q4 2026
- 2026-05-29A Phase 3a, Observer-blind, Randomized, Controlled, Study to Evaluate the Immunogenicity and Safety of an Investigational Varicella Vaccine Compared With Varivax, When Given as a Second Dose to Healthy Children, 3 Months After the Administration of a First Dose at 12 to 15 Months of AgeResults expected Q4 2026
- 2026-05-29A Phase 3a, Open-Label, Randomized, Controlled Study to Evaluate the Immunogenicity and Safety of Intramuscular Administration of an Investigational Varicella Vaccine and Priorix Compared With Subcutaneous Administration of Varivax and Priorix, When Given as a First Dose to Healthy Children 12 to 15 Months of AgeResults expected Q3 2026
- 2026-04-17A Phase III, Double-blind, Randomized, Multicenter, Multinational, Active-controlled, Non-inferiority Study to Evaluate Immunogenicity and Safety After the First and Second Doses of MG1111 (BARYCELA Inj.) in Healthy Children Aged 12 Months to 12 YearsResults expected Q3 2027
- 2026-07-15Immunogenicity and Safety of the Second Dose of Varicella Vaccine in Healthy Children: An Open-label StudyPrimary completion
- 2026-07-15ClinicalImmunogenicity and Safety of the Second Dose of Varicella Vaccine in Healthy Children: An Open-label StudyPrimary completion
- 2026-07-08ClinicalA Phase 3a, Observer Blind, Randomized, Controlled Study to Evaluate the Immunogenicity and Safety of Intramuscular Administration of an Investigational Combined Measles, Mumps, Rubella, and Varicella Vaccine Compared With Intramuscular Administration of ProQuad When Administered as a Second Dose to Healthy Children Aged 15 Months to 6 Years of AgeResults expected Q1 2028
- 2026-05-29ClinicalA Phase 3a, Observer-blind, Randomized, Controlled Study to Demonstrate Lot-to-lot Consistency and Evaluate the Immunogenicity and Safety of an Investigational Varicella Vaccine Compared With Varivax, Administered as a First Dose to Healthy Children 12 to 15 Months of AgeResults expected Q4 2026
- 2026-05-29ClinicalA Phase 3a, Observer-blind, Randomized, Controlled, Study to Evaluate the Immunogenicity and Safety of an Investigational Varicella Vaccine Compared With Varivax, When Given as a Second Dose to Healthy Children, 3 Months After the Administration of a First Dose at 12 to 15 Months of AgeResults expected Q4 2026
- 2026-05-29ClinicalA Phase 3a, Open-Label, Randomized, Controlled Study to Evaluate the Immunogenicity and Safety of Intramuscular Administration of an Investigational Varicella Vaccine and Priorix Compared With Subcutaneous Administration of Varivax and Priorix, When Given as a First Dose to Healthy Children 12 to 15 Months of AgeResults expected Q3 2026
- 2026-04-17ClinicalA Phase III, Double-blind, Randomized, Multicenter, Multinational, Active-controlled, Non-inferiority Study to Evaluate Immunogenicity and Safety After the First and Second Doses of MG1111 (BARYCELA Inj.) in Healthy Children Aged 12 Months to 12 YearsResults expected Q3 2027
Clinical trials
The current development programme across all trial phases.
Research activity
Key research shaping understanding of this disease, combining the latest publications with the most influential evidence.
Major themes1
- Immunity, Innate1
Leading journals1
- Frontiers in immunology1
Leading researchers7
- Abendroth A1
- Campbell TM1
- Gerada C1
- Kennedy JJ1
- McSharry BP1
- Slobedman B1
- Steain M1
Affiliations (unnormalised)1
- Charles Perkins Centre1
Reference
Authoritative identity, definition & identifiers.
A highly contagious infectious disease caused by the varicella-zoster virus (HERPESVIRUS 3, HUMAN). It usually affects children, is spread by direct contact or respiratory route via droplet nuclei, and is characterized by the appearance on the skin and mucous membranes of successive crops of typical pruritic vesicular lesions that are easily broken and become scabbed. Chickenpox is relatively benign in children, but may be complicated by pneumonia and encephalitis in adults. (From Dorland, 27th ed)
- Disease identity & definition — NLM Medical Subject Headings (MeSH), public domain
- Clinical trials — ClinicalTrials.gov (U.S. National Library of Medicine)
- Research activity — Europe PMC (EMBL-EBI) + OpenAlex-derived paper links
- Related entities are derived from literature co-mention (studied together) — associative, not causal.