Vaccination Schedule Calculator

India runs two overlapping immunisation schedules, and knowing which one a clinic is following explains most of the confusion parents encounter.

Two schedules

The Universal Immunization Programme (UIP) is the government schedule, free at all public health facilities. It covers twelve vaccine-preventable diseases nationally, with a few more in specific states, and it is the schedule the vast majority of Indian children follow.

The IAP schedule, published by the Indian Academy of Pediatrics, includes everything in the UIP plus optional vaccines that are recommended but not provided free — typically hepatitis A, varicella, influenza, and in some formulations pneumococcal and rotavirus where a state has not adopted them.

Neither is more correct. The UIP is the public health floor; the IAP schedule is what a paediatrician in private practice will usually offer. A child following the UIP schedule fully is well protected against the diseases that cause the most serious burden in India.

The core schedule

Pentavalent covers diphtheria, pertussis, tetanus, hepatitis B and Haemophilus influenzae type b in one injection — five diseases in one needle, which is why it replaced separate DPT and hepatitis B doses.

Pregnant women receive two doses of Td, or one booster if previously immunised.

Why intervals matter more than dates

The schedule states ages; the underlying rules are about intervals.

Minimum intervals are binding. A dose given earlier than the minimum interval after the previous one may not produce a proper immune response, and it usually does not count — it has to be repeated. Four weeks is the standard minimum between primary doses.

Maximum intervals are not binding. A delay does not reduce the eventual protection once the course is completed. There is no upper limit beyond which the earlier doses stop counting.

This is the single most reassuring fact for a parent who has fallen behind, and it is widely misunderstood.

A missed dose does not restart the course

The course resumes from where it stopped. A child who received two of three pentavalent doses and then missed a year needs the third dose, not all three again.

This is true for every vaccine in the schedule. There is no vaccine in routine use in India that requires restarting a series because of a delay.

Catch-up is possible at any age up to the upper limit for the specific vaccine, and a paediatrician or the local health facility will construct a catch-up schedule from whatever the card shows.

The corollary is worth stating: being behind is not a reason to give up. A child who is two years behind should still be caught up, and the protection they gain is the same.

Vaccines with an age ceiling

Most vaccines can be given late. A few cannot.

Rotavirus. The first dose must be given before 15 weeks and the last before 8 months. The restriction exists because of a small association with intussusception in older infants. A child who misses the window does not receive it at all.

BCG. Given at birth or as soon as possible after. It can be given up to one year; beyond that it is generally not given, since most children have had natural exposure by then.

HPV. Most effective before sexual debut, which is why it is recommended at 9 to 14 years. It is still given later and with a three-dose schedule instead of two.

Where a window has been missed, the answer is not to skip the rest — it is to complete everything else on time.

When to delay a dose

The list of genuine reasons is short, and it is shorter than most people assume.

Delay for: moderate or severe acute illness with fever. A high fever is a reason to wait a few days.

Do not delay for: a mild cold, low-grade fever, mild diarrhoea, current antibiotic treatment, a family history of reactions, prematurity — premature babies are vaccinated by chronological age, not corrected age — mild egg allergy, or breastfeeding.

Delaying for a mild illness is the most common cause of a schedule slipping, and it delays protection without any benefit.

Genuine contraindications are rare: a confirmed severe allergic reaction to a previous dose or a component, and live vaccines in significantly immunocompromised children. Both are decisions for a doctor, not for a checklist.

After the injection

Fever, irritability, reduced appetite and soreness at the injection site are common, expected and short-lived — usually 24 to 48 hours. They reflect the immune system responding, which is the point.

Paracetamol at the weight-appropriate dose is appropriate for discomfort. A cool compress helps local soreness. Giving paracetamol prophylactically before the injection is no longer recommended, since some evidence suggests it slightly blunts the antibody response.

Seek medical attention for: a fever above 40°C, a seizure, persistent inconsolable crying beyond three hours, or any sign of an allergic reaction — swelling of the face or throat, difficulty breathing, widespread hives.

Serious reactions are rare enough to be measured in cases per million doses, and the diseases prevented are not.

Keeping the record

The immunisation card is the only reliable record and it is genuinely needed.

School admission requires it in most Indian schools. Travel to some countries requires proof of specific vaccines. A doctor constructing a catch-up schedule needs to know exactly what was given and when, and cannot work from memory.

Photograph the card each time it is updated and keep the image somewhere retrievable. Cards are lost, and reconstructing a history from a clinic's records years later is frequently impossible — at which point the safe assumption is that a dose was not given, and it is repeated unnecessarily.

What the optional vaccines cover

The IAP schedule includes vaccines the national programme does not fund, and whether to pay for them is a real question rather than an automatic yes.

Hepatitis A, two doses from 12 months. Spread through contaminated food and water, so the case is stronger where water safety is uncertain — which is much of India.

Varicella (chickenpox), two doses from 15 months. The disease is usually mild in children and considerably worse in adults, and it can cause shingles decades later.

Typhoid conjugate, from 6 months with a booster. Typhoid remains common in India and drug-resistant strains are increasing, which has strengthened the case for this one.

Influenza, annually from 6 months. Worth it particularly for children with asthma or other chronic conditions.

HPV, two doses at 9 to 14 years for girls and increasingly recommended for boys. India introduced an indigenous vaccine which has substantially reduced the cost.

Meningococcal and Japanese encephalitis outside endemic districts, in specific circumstances.

The paediatrician's recommendation should account for where you live, the child's health, and what the household can sustain — a partial optional schedule completed is better than a full one abandoned halfway.

Where to get them

Government facilities provide the full UIP schedule free, at primary health centres, district hospitals and through fixed-day sessions in most areas. Village health and nutrition days bring the same vaccines to communities on a set day each month.

Private paediatricians offer the UIP vaccines plus the optional ones, charged per dose.

The Co-WIN and U-WIN platforms now record childhood immunisation digitally in many states, which produces a record that survives a lost card. Registering there is worth doing at the first visit.

Vaccines are the same product in both settings, procured under the same regulatory approvals. Where a family is choosing between them, the difference is convenience and the optional vaccines, not the quality of what is given.

What this calculator assumes

• The standard UIP and IAP schedules current at the time of writing. Both are revised periodically and state programmes vary.
• Dates calculated from the date of birth you enter, using the recommended age for each dose.
• A full-term, healthy infant. Premature babies are vaccinated by chronological age but may need additional doses for some vaccines.
• Optional vaccines are shown separately from the free national programme.
• This is a reference, not medical advice. Your paediatrician's schedule takes precedence, and any catch-up plan should come from them.