CHESTPress ReleasesWorld TB Day 2024

Break the Chain of Transmission to End TB

For World TB Day 2024, respiratory groups call for comprehensive TB screening in high-burden settings

GLENVIEW, IL On World TB Day, March 24, 2024, the Forum of International Respiratory Societies (FIRS), of which the American College of Chest Physicians (CHEST) is a founding member, calls on all stakeholders, including multilateral agencies, governments, national and local programs, nongovernmental organizations, academics, activists and donors, to focus on activities that will break the chain of transmission in high-burden settings in order to end TB.

In high-burden settings, TB is endemic, meaning everyone is at risk, all the time, through the unbroken chain of transmission. To break the chain, it is critical that we screen everyone in high-burden settings for TB so that we can find and treat all people with TB and prevent them from infecting others. The latest evidence shows that in high-burden settings, most people with infectious TB do not have symptoms (such as cough or fever), and many are not members of high-risk groups. Hence, it is vital that screening for TB is not limited to those with symptoms or those who are members of high-risk groups.

During the height of the COVID-19 pandemic, before the availability of vaccines, this approach of widespread testing was rolled out by governments across the globe and proved to be highly effective in controlling the spread of COVID-19.

Professor Guy Marks, President and Interim Executive Director of the International Union Against Tuberculosis and Lung Disease (The Union), a member of FIRS, says, “We must be brave and recognize that the current strategy to end TB in high-burden countries is not achieving the results we hoped for. We need to change our approach if we are to win the fight against this infectious disease.”

Professor Marks explains, “The incidence of TB in high-burden countries is falling at a glacially slow pace. The simple reason for this is that far too many people with TB remain undiagnosed and untreated, often because they do not experience or recognise symptoms that lead to a diagnosis. These people are infectious and can transmit the infection to others in their households, workplaces and communities. So, the transmission continues: More people are infected, and many of them develop TB.”

It was the same with COVID-19, another airborne infection, where much of the spread in the community occurred from people with infectious COVID-19 who did not have symptoms.

Professor Marks adds, “The latest evidence suggests that in high-burden settings, most people with TB have been recently infected (within the last 2 years). This means that reducing the rate of new infections (or reinfections) with TB can have a big impact on preventing people from becoming sick with TB, and hence, breaking the chain of transmission and ending TB.”

The standard approach to controlling TB has been to wait for people to seek care, be correctly diagnosed and take medication. However, we now know that many people with infectious TB do not have symptoms and, as a result, do not visit health care facilities seeking care.

Additionally, those who do seek care often encounter hurdles in terms of accessing diagnosis and treatment due to TB not being appropriately prioritized by health care systems.

Professor Marks concludes, “These strategic and operational modifications will not achieve an end to TB in isolation. They must be accompanied by a change in public mindset and behavior toward TB.”

About the American College of Chest Physicians
The American College of Chest Physicians® (CHEST) is the global leader in the prevention, diagnosis and treatment of chest diseases. Its mission is to champion advanced clinical practice, education, communication and research in chest medicine. It serves as an essential connection to clinical knowledge and resources for its 22,000+ members from around the world who provide patient care in pulmonary, critical care and sleep medicine. For information about the American College of Chest Physicians, and its flagship journal CHEST®, visit

About the Forum of International Respiratory Societies
The Forum of International Respiratory Societies (FIRS) is an organization comprised of the world's leading international respiratory societies working together to improve lung health globally. The goal of FIRS is to unify and enhance efforts to improve lung health through the combined work of its more than 70,000 members globally.

FIRS comprises the American College of Chest Physicians (CHEST), American Thoracic Society (ATS), the Asian Pacific Society of Respirology (APSR), Asociación Latinoamericana de Tórax (ALAT), European Respiratory Society (ERS), International Union Against Tuberculosis and Lung Disease (The Union), Pan African Thoracic Society (PATS), the Global Initiative for Asthma (GINA) and the Global Initiative for Chronic Obstructive Lung Disease (GOLD).

The Global Impact of Respiratory Disease report outlines major causes of respiratory disease and lays out recommendations for global action.