The White Plague Is Back — And 13 Million Americans Are Already Infected
Most people think tuberculosis is a thing of the past. A disease from old novels and black and white photos. Something we beat a long time ago.
We didn't beat it. We just stopped paying attention to it.
TB quietly took back its title as the world's deadliest infectious disease in 2023 after COVID briefly knocked it off the top spot. It kills around 1.6 million people globally every year — more than HIV/AIDS and malaria put together. And in the U.S., after three solid decades of cases going down, the numbers have been creeping back up since 2020.
The CDC counted 10,260 TB cases across the country in 2025. New York alone had 967 of them.
So, What Actually is TB?
It travels through the air. Someone with active tuberculosis coughs, sneezes, sings, or just talks, and microscopic bacteria float out and into whoever is nearby. That's the whole mechanism. No contact required.
It usually goes after the lungs first but can reach the kidneys, spine, and brain. The early symptoms are the sneaky part — persistent cough, fatigue, night sweats, and losing weight without trying. Sounds like the flu. Looks like RSV. Doctors miss it, patients brush it off, and meanwhile that one person is potentially infecting 10 to 15 others every year without knowing it.
Then there's latent TB, which is its own unsettling thing. The bacteria live dormant in the body, no symptoms, can't spread it to anyone — until something weakens the immune system and it wakes up. The CDC thinks up to 13 million Americans are walking around with latent TB right now. More than 80% of new US cases come from those old infections finally switching on.
The Drug Resistance Problem Is Real
Treatment already isn't simple. You need a combination of antibiotics taken every day for six to nine months minimum. The problem is people start feeling better way before the bacteria are actually gone, so they stop taking the medication. The bacteria that survive that incomplete treatment are the ones that figured out how to resist the drugs.
In 2023 alone, 589 TB cases in the US involved bacteria resistant to at least one front-line antibiotic. That number is going the wrong direction.
Dr. Kohta Saito of Weill Cornell Medicine put the frustration plainly — people stop treatment because they feel better or the side effects get rough, and that's exactly what creates strains that are harder and harder to kill.
Drug-resistant TB isn't a future threat. It's already here.
How Bad Can It Get Without Treatment
Roughly half of people with untreated active TB die from it. The bacteria destroy lung tissue and trigger chemicals that kill the appetite until the body just shuts down.
"Without treatment, it destroys your lungs, and you waste away," said Dr. Michelle Barron of UCHealth. "It produces chemicals in your body that suppress your appetite. You stop eating, and your body stops functioning."
A vaccine has existed since 1921 and gets used routinely in high-risk parts of the world. The US doesn't use it as standard practice because transmission rates were historically low enough to skip it. That math deserves a second look.
What To Actually Do
If you have symptoms that won't quit — cough that lingers, night sweats, unexplained weight loss — see a doctor and mention TB as a possibility. If you've been in close contact with someone who has it, get tested even if you feel fine. Treating latent TB before it activates is the single most effective way to stop new cases from spreading.
If you're around someone with confirmed active TB, mask up, keep distance, and open the windows.
TB is treatable. It is also very good at being ignored until it's too late. That's been its whole strategy for centuries, and it's still working.
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