Delhi Grapples With Low Adult Vaccination Rates as Winter Pollution Poses Health Risks

Delhi faces a major health risk as winter approaches, with medical experts pointing out that while infants receive free protection against pneumococcal disease, adults aged 60 and above have a vaccination rate of just 0.40 per cent according to National Sample Survey Office 80th Round Data on Health. Older adults with conditions like diabetes, heart disease, or chronic obstructive pulmonary disease face a high risk of viral infections turning into bacterial pneumonia, often leading to costly hospital stays averaging ₹50,000 and intensive care expenses reaching ₹1 lakh.

Winter Health Crisis

The city's winter weather and poor air quality worsen respiratory vulnerabilities. In December 2025, Delhi recorded an average Air Quality Index of 351, its most toxic month in six years. Government records show over 2,000,000 cases of acute respiratory illness and 30,000 hospital admissions across six Delhi government hospitals between 2022 and 2024, with doctors noting a 20 per cent to 30 per cent surge in respiratory patients during heavy pollution periods. Nationally, India recorded 35,987 pneumonia deaths in 2024 according to the Medical Certification of Cause of Death, though experts note this is an underestimate since many older individuals pass away at home.

Potential Solutions

While infants achieve an 83 per cent vaccination rate through government programmes like the Universal Immunisation Programme and Mission Indradhanush, India lacks a National Adult Immunisation Policy. Consequently, older adults must rely on the private market, which many low-income families cannot afford. The 2026 Indian consensus guidelines on adult immunisation recommend pneumococcal vaccination for adults aged 50 and above, or younger adults with health risks. Researchers suggest Delhi could utilise its dispensary and mohalla clinic network to provide free vaccines to high-risk residents aged 60 and older before winter sets in, pointing out that the cost of a vaccine dose is much lower than hospitalisation.

Context

Seasonal air pollution in northern India traps particulate matter close to the ground during colder months, severely weakening respiratory defenses in vulnerable populations. Public health programmes in India have historically focused heavily on infant and maternal care, leaving adult immunisation largely dependent on private out-of-pocket spending. Bridging this gap requires administrative policy changes to extend preventative healthcare access to aging populations.