What is tuberculosis and how dangerous is it?

Tuberculosis (TB) is a bacterial infection that primarily attacks the lungs but can affect any part of the body. Without treatment, TB is fatal in about half of cases. Even with modern treatment, TB kills over 1 million people annually. Drug-resistant TB strains make treatment more difficult and dangerous.

How does tuberculosis spread?

TB spreads through the air when a person with active pulmonary TB coughs, sneezes, speaks, or sings, releasing bacteria-containing droplets. You can only get TB from someone with active disease in their lungs or throat. Close, prolonged contact (living or working together) poses the highest risk. You cannot get TB from touching surfaces, sharing food, or brief contact.

What is the difference between latent and active TB?

Latent TB means you're infected with TB bacteria but not sick and can't spread the disease. About 5-10% of people with latent TB develop active TB in their lifetime, especially if their immune system weakens. Active TB causes symptoms and can spread to others. Both conditions are treatable, but active TB requires more intensive, longer treatment.

Is there a vaccine for tuberculosis?

Yes, the BCG (Bacille Calmette-Guérin) vaccine is used in many countries where TB is common. BCG is effective at preventing severe TB in children (TB meningitis) but provides variable protection against pulmonary TB in adults. In the U.S., BCG is not routinely used due to low TB prevalence and variable effectiveness.

What is drug-resistant TB?

Drug-resistant TB occurs when bacteria become resistant to standard TB medications. Multi-drug resistant TB (MDR-TB) doesn't respond to at least isoniazid and rifampin, the two most powerful TB drugs. Extensively drug-resistant TB (XDR-TB) is resistant to even more drugs. These forms require longer treatment (18-24 months) with more toxic, expensive medications and have lower cure rates.

Where is tuberculosis most common?

TB occurs worldwide but is most prevalent in Southeast Asia, Africa, and the Western Pacific. Eight countries account for two-thirds of global TB cases: India, Indonesia, China, Philippines, Pakistan, Nigeria, Bangladesh, and South Africa. Check the live outbreak data above for current TB trends.

Michigan

Tuberculosis in Michigan

Tuberculosis (TB) is a contagious bacterial infection that primarily affects the lungs but can spread to other organs. It remains one of the world's deadliest infectious diseases, second only to COVID-19 in recent years.

No active Tuberculosis reports in Michigan right now.

It can change overnight. Be the first to know when it does.

Track on iPhone Track on Android Web

What is Tuberculosis?

Tuberculosis is caused by the bacterium Mycobacterium tuberculosis. In 2022, 10.6 million people fell ill with TB, and 1.3 million died from the disease. One-quarter of the world's population is estimated to be infected with TB bacteria, though most have latent TB (not sick or contagious). TB is curable and preventable, yet it continues to claim lives, particularly in low and middle-income countries.

Symptoms

Persistent cough lasting 3+ weeks
Coughing up blood or mucus
Chest pain when breathing or coughing
Unintentional weight loss
Fatigue and weakness
Fever and night sweats
Chills and loss of appetite

Transmission

TB spreads through airborne particles when a person with active pulmonary TB coughs, sneezes, speaks, or sings. Prolonged, close contact with an infected person increases transmission risk. TB is not spread by touching, sharing food, or brief contact. Poor ventilation increases transmission risk.

Contagious Period: People with active pulmonary TB can be contagious until treated for 2-3 weeks; latent TB is not contagious

Prevention

Early diagnosis and treatment of active TB cases
Treatment of latent TB infection to prevent progression
BCG vaccination in high-burden countries (protects children)
Good ventilation in indoor spaces
Respiratory hygiene (covering mouth when coughing)
Isolation of infectious TB patients until no longer contagious
Regular screening for high-risk populations
UV light or air filtration in healthcare settings

Michigan Health Resources

Local health department information and state-specific prevention guidance

We're Monitoring Michigan

Our AI-powered surveillance continuously monitors Tuberculosis activity across Michigan. We track data from state health departments, local hospitals, CDC reports, and 50+ global health sources to provide early warning of emerging threats.

Get instant push notifications when Tuberculosis activity increases in Michigan or your specific county.

Open Web App

iOS Android

Michigan Health Department

For official state health alerts, vaccination locations, and public health guidance specific to Michigan, visit your state health department's website.

→ Michigan Department of Health → CDC Tuberculosis Information → CDC Health Topics

Understanding Tuberculosis: Key Questions

Whether you live in Michigan or are traveling there, knowing the symptoms, timeline, and when to seek care helps you act quickly if exposure occurs.

When to Seek Care

Seek care if you experience severe dehydration, bloody stools, high fever, or symptoms lasting more than 3 days. Children under 5, adults over 65, and immunocompromised individuals should seek care earlier.

Emergency symptoms: Severe dehydration, inability to keep fluids down for 12 or more hours, or neurological symptoms require emergency care.

Expert Resources & References

Trusted information from leading health organizations

CDC

Official guidance from the U.S. Centers for Disease Control and Prevention

View CDC Resources →

WHO

Global disease surveillance and guidelines from the World Health Organization

View WHO Resources →

Research

Latest peer-reviewed research and clinical studies

View Research →

Medically Reviewed Content

Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.

Last reviewed: 2026-07-18

Recent Tuberculosis Reports

No confirmed cases reported in Michigan yet. Here are the latest Tuberculosis reports from our global surveillance network.

The Indian Council of Medical Research's drone-assisted transport of tuberculosis (TB) sputum samples initiative significantly improved access to diagnostic services, with the median turnaround time for TB diagnosis decreasing from 15 days to 5 days for people living in remote an…

India · 00 · 2026-07-18

Christa Swanson is a Digital Media Producer at CBS Colorado in Denver. The Adams County Health Department is investigating after it says a case of active tuberculosis was confirmed at the Immigration and Customs Enforcement Processing Center in Aurora. Department officials have…

United States Minor Outlying Islands · Baker Island · 2026-07-18

Artificial intelligence is beginning to address that gap. Working with state TB divisions, Wadhwani AI has developed two AI-powered tools that enable health workers to identify vulnerable populations and detect infections earlier, reducing the chances of the disease spreading unn…

United States · Alaska · 2026-07-14

bohlah at 5-07-2026 08:31 PM (4 mins ago) (m) Medical experts have linked the rise in new Human Immunodeficiency Virus (HIV) infections in Nigeria to declining donor funding, worsening poverty, and reduced awareness campaigns, warning that the trend could reverse years of progres…

Nigeria · 2026-07-06

Want LBC stories before everyone else? Set us as your Preferred Source on Google By Alex Storey One person a week dies from undiagnosed tuberculosis in England according to a new study which suggests health workers could be overlooking the disease. Older British-born men were …

United States · Alaska · 2026-07-02

17% of silicosis and TB claims have been paid out as of 30 June The Tshiamiso Trust has paid out R2.7-billion in compensation to gold mineworkers who died from or became ill with silicosis and TB from working in South African mines. The R5-billion trust was established in 2020 fo…

South Africa · 2026-07-04

In the Indian context, research shows that a severely undernourished TB patient is four times more likely to die during treatment Every year, more than 26 lakh Indians are diagnosed with TB. The conversation that follows is almost always about which drugs, for how long, and whet…

India · 00 · 2026-07-09

In March 2018, India made a surprising announcement in a full auditorium on World TB Day. India would eliminate tuberculosis by 2025. Five years ahead of the global target. India did want to eliminate TB, but it was no easy task. Also, no one knew how or its cost. As we sit in m…

United States · Alaska · 2026-07-07

View all Tuberculosis alerts →

Frequently Asked Questions

Common questions about Tuberculosis answered by our epidemiology team

Related Diseases

Track other diseases with similar symptoms or transmission patterns

covid 19 pneumonia hiv aids bronchitis lung cancer

Get Tuberculosis Alerts for Michigan

Receive instant push notifications when Tuberculosis activity increases in Michigan or your travel destinations. Track 200+ diseases with location-based alerts. Used by healthcare systems, EMS, schools, and travelers worldwide.