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Why Keeping Vaccinations on Schedule Matters

A child's immune system is still developing during the early years, making protection against certain infections particularly important. Vaccination prepares the immune system to recognise specific diseases and respond more effectively if the child encounters them later.

Immunization for Children is therefore an important part of preventive paediatric care. It is not only about giving individual injections; it is about providing protection at the ages when children may be particularly vulnerable to certain vaccine-preventable diseases.

What Is Childhood Immunization?

Immunization is the process of protecting a child against specific infectious diseases through vaccines.

Vaccines train the immune system to recognise particular infections without requiring the child to experience the disease itself. Once the immune system develops this memory, it can respond more effectively when exposed to the infection in the future.

Depending on the vaccine, protection may require more than one dose or later booster doses.

Why Are Vaccines Given at Different Ages?

Parents sometimes wonder why vaccines cannot simply be given all at once.

Vaccination schedules are designed around factors such as the child's age, immune development, the age at which particular infections may pose greater risks, and how long protection needs to be maintained.

India's National Immunization Schedule includes vaccines given at birth, during infancy, and at later childhood ages.

Following the recommended timing helps ensure that children receive protection when it is intended to be most useful.

What Diseases Can Childhood Vaccines Help Prevent?

Routine childhood immunization can protect against several serious infections.

Depending on the recommended schedule and the child's individual circumstances, vaccines may provide protection against diseases such as:

• Polio
• Measles
• Rubella
• Diphtheria
• Pertussis
• Tetanus
• Hepatitis B
• Tuberculosis
• Rotavirus infection
• Pneumococcal disease
• Haemophilus influenzae type B disease
• Japanese encephalitis in applicable areas

The timing and eligibility for particular vaccines depend on the recommended immunization schedule.

What If a Child Misses a Vaccine?

Missing a scheduled dose does not mean that parents should simply abandon the vaccination schedule.

The important step is to discuss the missed dose with a healthcare professional. Depending on the vaccine and the child's age, a catch-up plan may be possible.

Delaying vaccines can leave a child without protection for longer than intended.

Parents should therefore avoid restarting or changing a vaccination schedule on their own.

What Can Happen If Children Remain Unvaccinated?

A child who has not received recommended vaccines may have a greater risk of developing diseases that could otherwise have been prevented.

Some vaccine-preventable infections can cause serious complications, hospitalisation, long-term health problems, or, in severe cases, death.

There is also a wider concern. When vaccination coverage falls, infections can spread more easily within communities and may place vulnerable people at greater risk.

Immunization Is Not Only About Infants

Vaccination does not stop after the first few months of life.

Children may need additional doses and booster vaccinations as they grow. The recommended childhood schedule includes vaccinations beyond infancy and into later childhood.

This is why parents should keep the child's vaccination record safely and check it whenever a scheduled visit is approaching.

What If Your Child Is Unwell?

Parents may sometimes postpone vaccination because their child has a minor illness or because they are uncertain whether a particular vaccine is appropriate.

The decision can depend on the child's condition and the specific vaccine. Certain medical circumstances may require vaccination to be delayed, while other situations may not prevent vaccination.

Instead of making the decision based only on symptoms, parents should discuss the situation with the child's paediatrician.

What Reactions Can Occur After Vaccination?

Some children may experience temporary reactions after receiving a vaccine.

These can include:

• Mild fever
• Soreness at the injection site
• Temporary swelling
• Irritability
• Tiredness

Such reactions are often short-lived. Parents should nevertheless ask their healthcare provider what to expect from the specific vaccine being administered and what signs would require medical attention.

Keep the Vaccination Record Updated

A vaccination card is more than a record of previous injections.

It helps parents and healthcare professionals identify which doses have already been given and which ones may be due next. This becomes particularly useful when families change doctors, travel, or realise that a scheduled dose may have been missed.

If you are unsure whether your child has received a particular vaccine, do not guess. Take the vaccination record to a paediatric consultation and have the schedule reviewed.

Don't Wait Until an Infection Becomes a Concern

Vaccination is a proactive part of your child’s healthcare, helping build protection before exposure to vaccine-preventable infections. If your child has a vaccination coming up, has missed a scheduled dose, or you want to confirm whether their immunizations are up to date, visit Dr. Chetan Singh, who provides Immunization for Children in Rohini Sector 16. Book an appointment to review your child’s vaccination history and receive guidance on the doses they need next.

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