World Lung Day, 25 September 2025 - Theme, History & Importance

World Lung Day (WLD) is a dedicated global awareness and action towards better lung health observed on September 25th, every year, globally to celebrate the most recent achievements in lung health.

On this day, various local and international organisations joined together to create awareness about the importance of having a healthy lung by creating lung health care campaigns globally, thereby making the world free from lung disease. In addition, this day commemorates the improvement made to prevent the severe respiratory diseases. However, numerous things still need to be addressed to achieve healthy lung and to create a world free from lung disease.

Importance of World Lung Day (WLD)

Lungs, the essential organs responsible for exchanging gases in the human body, are increasingly under threat from multiple factors such as smoking, pollution, respiratory infections, etc. Respiratory conditions can affect people in all countries; however, it disproportionally affects low-and middle-income countries (LMICs) where there is a scarcity of resources for management, prevention and research. The lung is highly vulnerable to damage and infection from external environmental factors due to constant exposure to chemicals, particles, and infectious organisms in the air. Globally, at least 200 crore people are exposed to toxic smoke of biomass fuel, usually burned in indoor stoves (poorly ventilated) or fireplaces, 100 crore people to polluted outdoor air and 100 crore to tobacco smoke. 

Five respiratory diseases are the most typical causes of sickness and death worldwide such as asthma, chronic obstructive pulmonary disease (COPD), lung cancer, acute respiratory tract infection and tuberculosis (TB). The burden of these respiratory conditions is high in low-to-middle-income countries, which are aggravated by smoking, air pollution and climate change.

Worldwide, over 6.5 lakhs people suffer from COPD-the third leading cause of death- and the numbers are increasing, asthma is the most typical long-term disease of childhood, affecting around 14% of kids and its occurrence in children is increasing, tuberculosis is the deadliest infectious disease, with 1.04 crore cases and 14 lakh losses (deaths) annually and lung cancer is the most common deadly neoplasm globally and the numbers are rising.

Pneumonia has been among the leading causes of death for decades and is the top cause of death in children under five years, sleep apnea impacts more than 1 crore individuals, and up to 10% of adults in specific settings, more than 5 crore people are affected by occupational lung disease, pulmonary hypertension happens in approximately 1% of the global population with a higher prevalence (10%) of those over 65 years of age and pulmonary embolism occurs at an incidence of 6-20 per 100,000. However, but this is grossly underestimated (this figure needs to be more recognized).

World Lung Day acts as an essential medium to emphasise healthy lungs, the pressing need to identify, prevent and treat several lung conditions and increase awareness regarding lung illnesses, promote lung health and support improved healthcare access.

World Lung Day 2025 Theme

This year, 2025, the World Lung Day theme is “Healthy Lungs, Healthy Life”.  This theme encourages people and communities to take simple, daily steps to protect their lung health. The campaign also aims to improve access to inhaled medicines and ensure that everyone receives the correct treatment for their condition.

“Lung disease is always present around us, whether from the common cold, air pollution or chronic illness, that takes your breath away. Our lungs require attention,” says Terry Dean, President and CEO of The National Lung Association.

Year by year, the themes for World Lung Day are:

• World Lung Day theme 2024 theme: Clean air and healthy lungs for all
• World Lung Day theme 2023 theme: Access to prevention and treatment for all. Leave no one behind
• World Lung Day theme 2022 theme: Lung Health for All
• World Lung Day theme 2021 theme: Care for your Lungs
• World Lung Day theme 2020 theme: Respiratory infections
• World Lung Day theme 2019 theme: Healthy lungs for all
  

History of World lung day 

The idea of World Lung Day (WLD) was first created during the 2016 FIRS Kyoto Assembly meeting hosted by Michiaki Mishima, FIRS President. The Forum of International Respiratory Societies (FIRS) is the association of international respiratory societies collaborating to enhance lung health worldwide.

FIRS organisation has around 100,000 members, united and working together for the FIRS mission to promote worldwide lung health through collaboration with other global organisations such as the World Health Organisation (WHO).

Prevention of Lung Diseases

Lung diseases can be prevented by detecting and treating the underlying cause early and practising the following preventive measures by:

• Abstaining smoking
• Avoiding exposure to air pollutants and certain chemicals
• Avoiding second-hand smoke
• Eating a healthy diet
• Getting regular checkups
• Being physically active
• Taking vaccines

Pulmonology Department | Pulmonology Hospital in Hyderabad