Varicella Zoster: When to Give Chickenpox Vaccine to Older Unvaccinated Kids

As a parent, it's natural to worry about your child's health, especially when it comes to common childhood illnesses like chickenpox. If your older child hasn't been vaccinated against chickenpox, you may be wondering when it's best to give them the vaccine. In this article, we'll explore the benefits of chickenpox vaccination, the recommended schedule according to the Indian Academy of Pediatrics (IAP) 2025, and what you need to know about the vaccine.

What is Varicella Zoster?

Varicella zoster, also known as chickenpox, is a highly contagious illness caused by the varicella-zoster virus. It's characterized by a blister-like rash, fever, and headache. While it's usually a mild illness in children, it can be serious in adults and people with weakened immune systems.

Benefits of Chickenpox Vaccination

The chickenpox vaccine, also known as the varicella vaccine, is a safe and effective way to protect your child against the varicella-zoster virus. According to the Centers for Disease Control and Prevention (CDC) and the World Health Organization (WHO), the benefits of chickenpox vaccination include:

• Prevention of severe illness and complications, such as pneumonia, encephalitis, and bacterial infections
• Reduced risk of hospitalization and death
• Protection against future outbreaks of chickenpox
• Reduced risk of shingles, a painful condition caused by the reactivation of the varicella-zoster virus

Recommended Schedule for Chickenpox Vaccination

The IAP 2025 schedule recommends that children receive two doses of the chickenpox vaccine:

• The first dose at 15-18 months of age
• The second dose at 4-6 years of age

However, if your child is older and hasn't been vaccinated, it's not too late. The American Academy of Pediatrics (AAP) recommends that children who haven't been vaccinated against chickenpox receive two doses of the vaccine, 4-8 weeks apart.

What to Expect from the Chickenpox Vaccine

The chickenpox vaccine is a live, attenuated vaccine, which means it contains a weakened form of the varicella-zoster virus. It's usually given as an injection in the arm or leg. Common side effects of the vaccine include:

• Mild pain, redness, or swelling at the injection site
• Fever
• Fatigue

Serious side effects are rare, but may include allergic reactions or seizures.

Frequently Asked Questions

Here are some common questions parents have about the chickenpox vaccine:

• Q: Is the chickenpox vaccine safe for my child? A: Yes, the chickenpox vaccine is safe and effective. It's been extensively tested and used in millions of children worldwide.
• Q: Can my child get chickenpox from the vaccine? A: No, the chickenpox vaccine contains a weakened form of the virus, which can't cause the illness.
• Q: How long does the chickenpox vaccine last? A: The chickenpox vaccine provides long-term protection against the varicella-zoster virus. However, it's possible for vaccinated children to still get chickenpox, although it's usually a mild illness.

If you're concerned about your child's vaccination schedule or have questions about the chickenpox vaccine, you can book a consultation with our expert team. We also offer a range of vaccines, which you can view in our full vaccine catalogue.