Tuberculosis — the airborne bacterial infection that was once the leading cause of death in the Western world and that three decades of public health investment had driven to record lows in the United States — is coming back. It is coming back in Chicago. It is coming back in Illinois. And it is coming back across the country with a combination of causes that are as much political as they are biological. According to data from the Illinois Department of Public Health, there were 353 active tuberculosis cases confirmed in Illinois in 2023. Of those, 154 were in the city of Chicago — fully 44% of all statewide cases concentrated in one urban center. The TB rate per 100,000 Illinois residents rose from 2.4 in 2022 to 2.75 in 2023. Nationally, active TB infections rose 15% from 2022 and reached their highest level since 2013. These are not small statistical fluctuations. They are a trend line that has been pointing upward for three years, and experts are not optimistic that it will reverse on its own.
To understand why Chicago is at the center of this resurgence, it is necessary to understand the specific mechanisms driving the national TB rebound — and how Chicago's particular combination of policy decisions and population dynamics has amplified all of them simultaneously. The most fundamental driver is what infectious disease specialists call the "rebound effect." Dr. Renuga Vivekanandan, professor at Creighton University School of Medicine and vice president and chief medical officer of CHI Health Physician Enterprise Midwest, explained the mechanism directly in a statement to Fox News Digital: "The COVID-19 pandemic effectively disrupted TB surveillance and treatment programs across the country. What we're seeing now is largely a rebound effect — latent TB infections that went undetected or untreated during the pandemic are now activating."
The mechanics of latent tuberculosis are critical to understanding why the pandemic's disruption has produced a delayed but intensifying aftershock. Tuberculosis infection exists in two states: latent, where the Mycobacterium tuberculosis bacteria are present in the body but inactive, causing no symptoms and posing no transmission risk; and active, where the bacteria are multiplying, causing disease, and capable of spreading through the air via coughing, sneezing, and even ordinary speech. In a healthy immune system, the body can contain a latent infection indefinitely. But in conditions of stress, immune compromise, inadequate nutrition, or disrupted access to the medications that treat latent infection — precisely the conditions that characterized much of the COVID-19 pandemic period — latent infections can reactivate and become active, symptomatic, and transmissible disease. The patients whose latent infections reactivated in 2023, 2024, and 2025 were infected years or decades earlier. They are not new infections. They are the deferred debt of a public health system that was unable to maintain its disease management infrastructure during a catastrophic emergency.
The second driver is the documented concentration of TB cases in communities with high proportions of individuals born outside the United States in countries where TB remains endemic. This is not a new phenomenon — TB disproportionately affects foreign-born populations in the U.S. and has for decades — but its salience has intensified with the scale of recent migration to cities like Chicago. According to Chicago Department of Public Health data, the city receives a significant volume of migrants and asylum seekers annually, and the shelter system that houses new arrivals has been at the center of multiple recent disease alerts. In April 2024, the CDPH confirmed TB cases at multiple Chicago migrant shelters, a disclosure that came just weeks after the same shelter network had been linked to a 56-case measles outbreak at the Pilsen Halstead shelter. Chicago Alderman Raymond Lopez was among the most vocal critics of the city's response, having been raising alarms since the previous August when ambulance records indicated positive TB results among shelter populations. Lopez made the obvious point that was apparently not obvious to city leadership: "This is a crisis we could have avoided, just like with the measles, if we had simply instituted the American standard of vaccines upon all those migrants being shipped to the city of Chicago." Instead, migrant children entering Chicago public schools had vaccination requirements waived — requirements that are mandatory for every American-born child. That double standard created identifiable, preventable vulnerability in a communicable disease environment that does not respect policy carve-outs.
"What we're seeing now is largely a rebound effect — latent TB infections that went undetected or untreated during the pandemic are now activating."
— Dr. Renuga Vivekanandan, Creighton University / CHI Health
The cost implications of the TB surge extend far beyond the human health toll. Data from Johnson County, Iowa — a mid-sized urban county experiencing TB patterns similar to Chicago's — illustrates what resurgent tuberculosis costs public health systems at the operational level. Johnson County's costs for TB contact tracing, surveillance, daily home visits to supervise patient medication, and quarantine measures have surged from $17,000 in 2020 to $65,000 in 2025. An additional $13,000 was spent on language translation services alone, since many TB cases occur in non-English-speaking immigrant communities. Multiply those costs across Chicago's vastly larger case volume, and the financial burden on Cook County Health becomes substantial. Adding to the pressure, the state of Iowa notified Johnson County last year that the rising caseload had become too expensive for the state to subsidize, shifting the full cost to the local health department. Illinois may face similar fiscal decisions if the trend continues.
Preliminary data from the National Tuberculosis Coalition of America, shared with Stateline in early 2026, suggests that some states are reporting case growth of 10% to 20% between 2024 and 2025 — before the final CDC surveillance data for that year is even released. "There are a number of tuberculosis program managers that are reporting double-digit increases," said Donna Hope Wegener, the coalition's executive director. She added that the cost of antibiotics used to treat TB is also rising, further straining program budgets. The CDC's provisional 2025 data report, released in March 2026, notes a slight overall decline compared to 2024 nationally — but cautioned that the Trump administration's immigration enforcement crackdown may have discouraged some infected individuals from seeking care, artificially suppressing the recorded case count rather than reflecting genuine disease reduction.
⚠ TB Symptoms — Seek Testing If You Experience These Signs
Persistent cough lasting 3 or more weeks · Coughing up blood or phlegm · Unexplained weight loss · Night sweats · Fever · Fatigue · Chest pain when breathing or coughing. Chicago residents can contact the Chicago Department of Public Health TB Program at 312-296-7394 (Mon–Fri, 8am–4pm). All TB-related clinical services through Cook County Health are available free of charge.
The drug resistance dimension makes the Chicago TB rebound especially concerning for the medium and long term. TB treatment requires a minimum six- to nine-month course of multiple antibiotics. Patient compliance is mandatory: skipping doses allows Mycobacterium tuberculosis to mutate and develop resistance to the drugs that were working against it. Drug-resistant TB — including multidrug-resistant TB (MDR-TB) and extensively drug-resistant TB (XDR-TB) — is dramatically harder and more expensive to treat, requires different drug regimens lasting up to 24 months, and carries significantly higher mortality rates. Chicago health officials are required by state law to implement directly observed therapy (DOT) for all confirmed TB cases, with health workers visiting patients daily to ensure medication compliance. This system works — when funded. Staffing constraints, budget limitations, and the geographic concentration of high-risk populations in specific Chicago neighborhoods create exactly the conditions in which compliance monitoring can break down, allowing drug-resistant strains to emerge.
⬛ ScienceTimes Analysis
Chicago's tuberculosis trend reveals a failure pattern that runs deeper than any single policy decision. The pandemic disruption of TB surveillance is a legitimate systemic explanation, but it does not excuse Chicago officials from the documented fact that alderman-level elected representatives were raising alarms about TB cases in migrant shelters in August 2023 — and the health department's response was to not disclose case numbers, not identify which shelters were affected, and characterize the situation as not an outbreak. That posture — minimize, don't disclose, hope it resolves — is the precise opposite of what epidemiologists recommend for a communicable airborne disease with a 6-9 month treatment window and significant drug resistance risk. The application of a double standard on vaccination and screening for recently arrived migrants versus U.S.-born residents is not compassion — it is a public health liability that falls hardest on the low-income, minority Chicago neighborhoods that share air and transit with shelter populations. TB does not care about political accommodations. It spreads through air, respects no zip code boundaries, and punishes the communities that are least equipped to absorb the burden of a containable but poorly managed disease.
The path forward for Chicago is not complicated in principle, even if it is politically challenging. It requires full vaccination and health screening for all individuals entering the public shelter system, regardless of immigration status, with the same standards applied to U.S.-born populations. It requires restoration and expansion of the directly observed therapy infrastructure that was eroded during the pandemic period. It requires honest, timely public disclosure of disease data so that community members, healthcare providers, and school administrators can make informed decisions. And it requires the city to treat a 44% concentration of a state's entire TB caseload in one municipality as the public health emergency it plainly is — not as a data point to be managed, contextualized, and quietly absorbed.
