930 deaths daily: How air pollution, malnutrition and stigma fuel India’s TB surge

Despite medical advancements, tuberculosis (TB) remains one of India’s leading causes of death with rising cases linked to air pollution, undernutrition and delayed care due to stigma. Experts called for early testing, effective implementation of government programs, vaccination and public awareness are critical in controlling its spread and improving treatment outcomes.

World Tuberculosis Day, observed on March 24, serves as a reminder of the ongoing fight against a disease that continues to pose public health challenges. While large-scale elimination strategies have been implemented, TB remains a major cause of morbidity and mortality in developing nations like India.

Why TB spreads

Air Pollution: A Major Risk Factor

Recent studies indicate that air pollution contributes to the spread and severity of TB. A 2022 study published in The Lancet Planetary Health found that long-term exposure to PM2.5 increases TB incidence. Research conducted in Delhi and Mumbai—two cities with severe air pollution—revealed higher TB prevalence in areas with poor air quality.

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Another 2024 study in BMC Public Health reported that indoor air pollution (IAP) contributed to 26% of TB infections, alongside other socioeconomic and environmental factors.

"Many Indians carry Mycobacterium tuberculosis in a latent form. Exposure to high levels of air pollution can trigger its activation by impairing lung function and weakening immune responses, leading to active TB. For TB patients, air pollution worsens lung inflammation, making recovery more difficult even with proper treatment."

— Dr. Akshay Budhraja, Senior Consultant & HOD, Respiratory & Sleep Medicine, Aakash Healthcare

Poverty & Malnutrition: Fueling TB Cases

A 2022 study in The Lancet found that 45% of TB patients in India are undernourished. Malnutrition weakens the immune system, making individuals three to four times more likely to develop active TB.

"Undernutrition isn’t just a risk factor—it fuels TB. When families struggle to afford nutritious food, their immune defenses weaken, creating the perfect conditions for TB to spread."

— Dr. Neetu Jain, Senior Consultant, Pulmonology, PSRI Hospital

Stigma & Delayed Care: A Silent Barrier

Fear of discrimination prevents many from seeking timely medical care, allowing the disease to progress and spread.

"Many patients fear being judged, ostracized, or losing their jobs. Some only seek help when they begin coughing up blood. Early diagnosis is crucial to controlling TB, yet stigma leads to delayed treatment and advanced disease stages that are harder to cure."

— Dr. Manav Manchanda, Director & Head, Respiratory, Critical Care, and Sleep Medicine, Asian Hospital

A Growing Concern: TB & Neurological Complications

"Tuberculosis affecting the central nervous system is a serious but often overlooked issue. Tuberculous meningitis (TBM) is its most severe neurological manifestation, causing meningeal inflammation, high intracranial pressure, and long-term neurocognitive impairment. Without timely diagnosis and treatment, TBM can lead to strokes, hydrocephalus, and irreversible brain damage."

— Dr. Praveen Gupta, Principal Director & Chief of Neurology, Fortis Hospital

The Challenge of Treatment Adherence

"One of the biggest challenges is ensuring patients complete their treatment, which typically involves six to nine months of antibiotics. Interruptions lead to drug resistance, making TB harder to cure and more lethal."

— Dr. Sushrut Ganpule, Consultant - Chest Medicine, Jupiter Hospital, Pune

Precautions, Prevention & Treatment

Early Testing:

Free sputum tests and molecular diagnostics are available at health centers.

Government Programs:

DOTS therapy (6–9 month drug regimen) cures 85% of cases, though 1.5 lakh drug-resistant TB cases in 2022 remain a challenge. Nikshay Poshan Yojana provides ₹500 monthly to TB patients for nutritional support.

Vaccination:

The BCG vaccine is administered to infants in high-risk areas to protect against severe TB forms.

Public Awareness:

Educational campaigns highlight TB transmission, symptoms and the importance of completing treatment.

Infection Control:

Proper ventilation in crowded areas and protective measures in healthcare settings help reduce transmission.