Every year during the last week of April, the world observes World Immunization Week (April 24–30), reflecting on one of medicine’s most powerful tools—vaccines. However, this is not just a symbolic observance. It serves as a critical reminder that millions of lives depend on a single decision: whether to vaccinate. As a neonatologist working closely with vulnerable newborns, I witness firsthand the consequences of missed immunization—not in theory, but in reality.
A Miracle We Often Overlook
To begin with, imagine a world without vaccines. Diseases like polio, measles, and tetanus once caused widespread disability and death. Although vaccines have drastically reduced these threats, they still persist where immunization gaps exist. According to the World Health Organization, vaccines prevent 3.5 to 5 million deaths globally each year. Yet, despite this success, millions of children and adults remain unvaccinated. Clearly, vaccination remains one of the greatest yet underutilized achievements in public health.
India’s Immunization Landscape: Progress with Gaps
India’s immunization journey reflects both progress and persistent challenges. The Universal Immunization Programme (UIP), one of the largest in the world, protects against 12 vaccine-preventable diseases. Encouragingly:
• India’s DTP-1 coverage has reached 93%, covering 2.47 crore infants
• Zero-dose children reduced from 0.11% in 2023 to 0.06% in 2024
• Mission Indradhanush improved coverage by 18.5 percentage points in targeted regions
However, gaps remain concerning:
• Only 76.4% of children (12–23 months) are fully vaccinated (NFHS-5)
• India accounts for 6.4% of global zero-dose children and 49.2% in South Asia
• In 2024, 909,000 children remained unvaccinated, while 454,000 were partially vaccinated
• Coverage gaps persist in urban slums, tribal areas, migrant populations, and even among urban educated groups influenced by misinformation
The Overlooked Crisis: Adult Vaccination
While child immunization shows progress, adult vaccination remains largely neglected. In fact, India lacks a structured national adult immunization programme.
• Influenza vaccine uptake among older adults: 0.1–0.4%
• Vaccine uptake (influenza, pneumococcal, typhoid, hepatitis B) in adults ≥45 years: <2%
• No national targets or funding for adult immunization
• Limited awareness and mostly out-of-pocket expenditure
Clearly, adult immunization represents a major gap in India’s healthcare system.
The Stark Divide: Child vs Adult Immunization
| Metric | Child Vaccination | Adult Vaccination |
|---|---|---|
| National Programme | ✅ UIP since 1978 | ❌ None |
| DTP Coverage | ~93% | Not measured |
| Full Immunization | ~76.4% | Data unavailable |
| Influenza Uptake | Included | 0.1–0.4% |
| Pneumococcal Vaccine | Available | <2% |
| Funding | Government-supported | Mostly private |
| Awareness | High | Low |
Why Newborns Need Protection the Most
From a neonatologist’s perspective, newborns remain the most vulnerable. Their immune systems are still developing, making early vaccination crucial. For instance, the hepatitis B vaccine given within 24 hours prevents lifelong liver disease. Similarly, BCG protects against severe tuberculosis forms. Furthermore, vaccines like pentavalent, polio, rotavirus, and pneumococcal build early immunity and significantly reduce infant mortality.
Essential Adult Vaccines Everyone Should Know
? Influenza — Every Single Year
Influenza causes serious complications, especially in the elderly, pregnant women, and those with chronic diseases. Since the virus mutates frequently, annual vaccination is essential.
? Typhoid — The Forgotten Adult Vaccine
Typhoid affects millions in India annually. Adults, particularly travellers and food handlers, must stay protected with booster doses every 2–3 years.
? Pneumococcal Vaccine — Adults Over 60
This vaccine prevents pneumonia, meningitis, and bloodstream infections, which are major causes of mortality in older adults.
? Tdap / Td Booster — Every 10 Years
Immunity against tetanus, diphtheria, and pertussis declines over time. Regular boosters are necessary, especially during pregnancy.
? Hepatitis B — For All Unvaccinated Adults
This vaccine prevents chronic liver disease and cancer. Healthcare workers must ensure complete immunization.
? HPV Vaccine — Up to Age 45
HPV causes cervical and other cancers. Vaccination significantly reduces cancer risk in both men and women.
? Herpes Zoster (Shingles) — Adults Over 60
This vaccine reduces the risk of painful nerve complications associated with shingles.
? COVID-19 — Stay Updated
Booster doses remain important, particularly for high-risk groups.
The Cocoon Strategy: Protecting Newborns
Importantly, the ‘cocoon strategy’ plays a vital role in neonatal protection. By vaccinating parents, caregivers, and family members, we create a protective shield around newborns who are too young to be vaccinated. Thus, adult vaccination directly safeguards infant health.
Busting Common Myths
MYTH: “I am healthy — I don’t need vaccines.”
FACT: Vaccines keep healthy individuals from becoming sick.
MYTH: “Vaccines are only for children.”
FACT: Immunity fades, and adults require boosters and new vaccines.
MYTH: “I had typhoid before — I am immune.”
FACT: Reinfection is possible, especially with resistant strains.
MYTH: “I took vaccines years ago — I am still protected.”
FACT: Many vaccines require periodic boosters.
What India Must Do
- Launch a national adult immunization programme with government funding
- Integrate adult vaccination into primary healthcare systems
- Mandate vaccines for high-risk occupations
- Train community health workers to counsel adults
- Develop a national adult vaccination registry
This World Immunization Week: Act Now
• ✅ Check your child’s immunization card — are all vaccines up to date?
• ✅ Check your own history — when was your last tetanus or typhoid booster?
• ✅ Adults over 60: ask your doctor about flu, pneumococcal, and shingles vaccines
• ✅ Pregnant mothers: ensure Tdap and influenza vaccines during this pregnancy
• ✅ Frequent travellers & food handlers: update your typhoid vaccine
• ✅ Healthcare workers: confirm hepatitis B immunity and annual flu shot
• ✅ Young adults: discuss the HPV vaccine with your doctor if not yet received
• ✅ Share verified information — not fear — on your social media this week
A Call to Complete the Immunization Journey
“We built a wall to protect our children and forgot to finish it. Adult vaccination is not a new wall — it is completing the one we already started.”
