Rubella Vaccine
Core Characteristics
- Live-attenuated viral vaccine.
- Derived from Wistar RA 27/3 vaccine strain.
- Grown in human diploid or chick embryo cell cultures.
- Formulated commonly as combination Measles-Rubella or Measles-Mumps-Rubella vaccine.
Administration Details
| Parameter | Specification |
|---|---|
| Dose volume | 0.5 mL |
| Route | Subcutaneous |
| Anatomical site | Right upper arm (deltoid insertion) or anterolateral thigh |
Storage And Handling
- Available in freeze-dried (lyophilized) form.
- Requires reconstitution with sterile diluent prior to use.
- Store frozen or at 2°C to 8°C.
- Highly sensitive to heat and light.
- Protect reconstituted vaccine from light.
- Discard unused reconstituted vaccine within 4 to 6 hours to prevent toxic shock syndrome.
Immunization Schedule
Universal Immunization Programme
- Administered as Measles-Rubella vaccine.
- First dose given at 9 to 12 months.
- Second dose given at 16 to 24 months.
Indian Academy Of Pediatrics Guidelines
- Recommends Measles-Mumps-Rubella vaccine over Measles-Rubella vaccine.
- First dose at 9 months.
- Second dose at 15 to 18 months.
- Third dose at 4 to 6 years to boost anamnestic response.
Efficacy And Immunogenicity
- Single dose provides lifelong protection in over 95% of vaccinees.
- Primary goal prevents Congenital Rubella Syndrome.
- Suboptimal coverage shifts disease epidemiology to older age groups, paradoxically increasing Congenital Rubella Syndrome incidence.
- Maternal antibodies interfere with vaccine response before 9 months.
Adverse Reactions
- Mild rash develops in 5% of vaccinees.
- Joint symptoms including arthralgia and arthritis occur 1 to 3 weeks post-vaccination.
- Joint symptoms predominantly affect susceptible post-pubertal females.
- Immune thrombocytopenic purpura occurs at frequency of 1 per 30,000 vaccinations.
- Chronic arthritis lasting less than 6 weeks constitutes notable serious adverse event.
Contraindications And Precautions
- Strictly contraindicated in severely immunocompromised states, including high-dose corticosteroid therapy exceeding 14 days and severe human immunodeficiency virus.
- Contraindicated during pregnancy.
- Avoid pregnancy for 4 weeks following vaccination.
- Accidental vaccination during pregnancy does not increase risk of congenital malformations.
- Accidental vaccination in pregnancy does not warrant medical termination.
- Delay vaccination 3 to 11 months following administration of antibody-containing blood products.
- Routine pregnancy testing prior to immunization remains unnecessary.