World TB Day: A Disease Dr. Ferrer Studied, Still Fought Today

On World Tuberculosis Day, the focus isn’t just on history, but also on reality. 

Tuberculosis has existed for thousands of years, shaping societies, medicine, and public health. Evidence of the disease has been found in human remains dating back nearly 9,000 years — and even in Egyptian mummies. 

And yet today, it remains the world’s deadliest infectious disease. 

Dr. Gustavo Ferrer, Dr. Jacobus Henri De Waard, and others in Venezuela studying tuberculosis in the Warao, an Indigenous people of Venezuela’s Orinoco Delta.

Despite being preventable and curable, tuberculosis continues to claim an estimated 1.23 million lives each year — surpassing COVID-19 once again as the leading infectious killer globally. 

More than 10 million people develop tuberculosis annually. In 2024 alone, about 10.7 million people fell ill, including 5.8 million men, 3.7 million women, and 1.2 million children. 

A Disease We Think We Understand — But Often Don’t 

Tuberculosis, or TB, is a bacterial infection that most commonly affects the lungs, though it can also spread to other parts of the body like the brain, spine, or kidneys. 

It spreads through the air when someone with active TB coughs, sneezes, talks, or even laughs. 

But one of the most important things people should understand is this: not everyone who is infected gets sick. 

Around one-quarter of the global population — nearly 2 billion people — carry TB bacteria. Most have what’s known as latent TB, meaning the infection is inactive. They have no symptoms and cannot spread the disease. 

The risk comes when TB becomes active. 

When that happens, symptoms can include a persistent cough lasting more than two weeks, chest pain, fatigue, weight loss, fever, night sweats, and in some cases, coughing up blood. 

Left untreated, TB can be fatal. 

Preventable. Curable. Still Spreading. 

What makes tuberculosis especially urgent and frustrating is that it is both preventable and curable. 

With proper testing, early diagnosis, and consistent treatment using antibiotics over several months, TB can be fully treated. 

Basic prevention measures can also reduce risk: 

• Covering your mouth when coughing 

• Practicing good hygiene like frequent handwashing 

• Avoiding close contact with others when sick 

• Ensuring proper ventilation in shared spaces 

• Completing treatment exactly as prescribed 

And yet, the disease continues to spread. 

Only about 78% of TB cases worldwide are diagnosed and treated. That means millions of people remain undiagnosed — continuing to spread the disease unknowingly. 

Progress, too, has been slow. Since 2015, global TB rates have declined by only about 12%, far short of international targets aimed at dramatically reducing deaths and infections. 

Why? Because access to care is uneven. Because early detection doesn’t reach everyone. Because awareness still falls short. 

Dr. Ferrer’s Take 

For Dr. Gustavo Ferrer, tuberculosis has been part of his work since the very beginning. 

After completing his medical education in Cuba, he was selected by the United Nations to study tuberculosis affecting Indigenous communities in Venezuela’s Orinoco River region. 

The Warao, an Indigenous people of Venezuela’s Orinoco Delta, often called the “people of the canoe” for their deep connection to the river, were the focus of United Nations research on tuberculosis in their communities.

That early experience working directly with vulnerable populations shaped how he understands the disease today. Not just as an infection, but as a reflection of gaps in access, diagnosis, and public health infrastructure. 

“TB remains the world’s deadliest infectious disease,” Dr. Ferrer said. “Over 10 million people develop it every year, and millions of cases are still missed or undiagnosed.” 

Even with effective treatments available, he emphasizes that progress has not moved fast enough to meet global goals. 

A Disease That Has Shaped Human History 

For centuries, tuberculosis was misunderstood and often feared. 

Before the discovery of the TB bacterium in 1882, some believed the disease was hereditary or even supernatural. In the early 1800s, “vampire panics” spread through parts of New England, where families believed loved ones who died of “consumption” were returning to infect the living. 

By the 19th century, TB had earned another name: the “White Plague,” referring to the pale, thin appearance of those affected. It was paradoxically romanticized, influencing artists and writers like Edvard Munch, Claude Monet, and John Keats. 

Even in music, its impact was felt. Cuban composer Pedro Junco wrote the song “Nosotros” as a farewell after being diagnosed with tuberculosis — a piece that continues to be performed decades later. 

Everything changed in 1882, when scientist Robert Koch identified the bacterium responsible for TB — laying the foundation for modern diagnosis and treatment. 

From there came skin tests, vaccines, and antibiotics that transformed TB from a death sentence into a treatable disease. 

But as World Tuberculosis Day reminds us, progress is not the same as elimination. 

What World TB Day Is Really About 

World Tuberculosis Day is not just about awareness — it’s about closing the gap between what we know and what we do. 

Until more people are diagnosed early, treated consistently, and educated about the disease, tuberculosis will continue to impact communities around the world. 

When to Take Action 

If you think you’ve been exposed to tuberculosis, or if you’re experiencing symptoms like a persistent cough, fever, or unexplained weight loss, it’s important to talk to your healthcare provider right away. 

Early testing and treatment can protect not only your health but the health of those around you. 

Because even today, one of the most powerful tools we have against tuberculosis is simple: knowing when to act.