Discuss National Immunisation Schedule — its causes, clinical features and management.

Definition

• The Universal Immunisation Programme (UIP) is India's national programme providing free vaccines against vaccine-preventable diseases to all children and pregnant women.
• Immunisation is one of the most cost-effective public-health interventions.

National Immunisation Schedule

Key Vaccine-preventable Diseases Covered

• Tuberculosis (severe forms), poliomyelitis, diphtheria, pertussis, tetanus (including neonatal/maternal).
• Hepatitis B, Haemophilus influenzae type b disease, measles, rubella, rotaviral diarrhoea, pneumococcal disease, and Japanese encephalitis (endemic areas).

Objectives of the Uip

• Reduce morbidity and mortality from vaccine-preventable diseases.
• Achieve and sustain high coverage; work toward elimination/eradication (polio, measles-rubella, neonatal tetanus).

Routes & Sites of Administration

Evaluation of the Programme

• Fully immunised child — all due vaccines received by 1 year (measles by 9–12 months).
• Coverage evaluation surveys; drop-out rates (e.g. Penta-1 to Penta-3).

Iap (office-practice) Additional Vaccines

• Beyond the UIP, the IAP recommends additional/optional vaccines for those who can afford them — e.g. hepatitis A, varicella, typhoid conjugate, influenza, HPV, meningococcal.
• HPV for adolescent girls (cervical cancer prevention) is increasingly emphasised.

Vaccine-preventable Disease Burden

The UIP has driven dramatic declines in diphtheria, neonatal tetanus, measles and polio; sustaining high coverage and reaching the unreached remain the key challenges.

Common Reasons for Drop-out / Low Coverage

• Lack of awareness, fear of AEFIs, false contraindications, and access/logistic barriers.
• Migration and 'hard-to-reach' populations; addressed by outreach, Mission Indradhanush and communication.

Special Campaigns

Alongside routine immunisation, campaigns such as Pulse Polio and Intensified Mission Indradhanush boost coverage and target unreached children to close immunity gaps.

Missed Opportunities & Catch-up

• Every health-facility contact should be used to give any due vaccine; withholding for false contraindications creates missed opportunities.
• An interrupted schedule is resumed from where it stopped (never restarted), with catch-up as per guidelines.

Benefits of the Programme

• Prevents death and disability from vaccine-preventable diseases at very low cost.
• Contributes to elimination/eradication goals and reduces health-system burden.

Elements of a Successful Programme

• Reliable vaccine supply and cold chain; trained staff and safe injection practices.
• Community demand generation and record-keeping (immunisation cards, digital registries); monitoring and evaluation of coverage.

Principles of Scheduling

• Give all due vaccines at a visit (no false contraindications); minimum intervals between doses must be respected.
• An interrupted schedule is resumed, not restarted; catch-up as per guidelines.

WHY You Must Never Miss an Opportunity

• The single most damaging error in immunisation practice is understanding why turning a child away because of a minor illness — or because 'the vials are for another day' — causes far more harm than it prevents.
• Health workers, out of caution, routinely defer vaccination for a mild fever, a cold, diarrhoea, malnutrition, a course of antibiotics, or because the child is breastfeeding — none of which is a contraindication.
• But the family may have travelled far, may not return, and the child — who is now more vulnerable because they are ill and malnourished — remains unprotected.
• Every such deferral is a missed opportunity, and missed opportunities are a leading cause of low coverage in India.
• The rules are therefore clear: give all the vaccines that are due at the same visit (there is no limit to the number that can be given together, and simultaneous administration does not reduce their efficacy or increase reactions — just use different sites); do not restart an interrupted schedule (simply resume it — no dose is 'wasted'); and screen the immunisation status of every child who attends for any reason.