Recent Increase in Meningococcal Disease Cases in Chicago
In the past two weeks, Chicago has reported two deaths and at least seven cases of meningococcal disease among adults. This marks a notable rise in cases of this serious illness, according to the Chicago Department of Public Health.
Usually, the city experiences around 10 to 15 cases of Neisseria meningitidis infections in a year, predominantly during winter months. Neisseria meningitidis, or meningococcus, is a bacterium responsible for meningitis, leading to infections of the brain lining and spinal cord, as well as bloodstream infections. While various bacteria and viruses can cause meningitis, meningococcus is particularly severe and poses a high risk of fatality.
The health department has noted a recent increase in meningococcal disease cases within the city.
“In January 2026, we’ve seen more cases than usual for a single month; we are actively investigating and haven’t yet found clear connections among the cases in the community,” the department stated.
Reports indicate that at least two individuals affected were residing in the same temporary homeless shelter.
Initially, symptoms can mimic those of common illnesses—fever, chills, fatigue, and nausea—but they can escalate rapidly to life-threatening conditions. Those who experience symptoms like a stiff neck, sensitivity to light, cold extremities, severe discomfort, vomiting or diarrhea, or dark purple rashes should seek medical attention immediately.
The disease isn’t spread as easily as colds or the flu. Typically, it requires direct contact with saliva and close, prolonged interactions to transmit, such as through kissing or living together.
Even with antibiotic treatment, 10% to 20% of individuals who contract the disease do not survive, according to the health department.
The illness predominantly affects the elderly, teenagers, and young adults.
“It’s always concerning to hear about these cases,” noted Dr. David Nguyen, an infectious disease specialist at Rush University System for Health. He mentioned that there has been a national rise in cases recently, possibly linked to lower vaccination rates.
Illinois health officials recommend the meningococcal ACWY vaccine for all individuals at ages 11 or 12, with a booster at 16.
Most individuals shouldn’t feel overly worried about the recent meningococcal cases in Chicago unless they’ve had close contact with an infected person. However, it serves as a reminder to ensure vaccinations are up to date, according to Nguyen.
“While most people aren’t in settings like dormitories, military barracks, or homeless shelters, if you find yourself in one of those situations, it’s crucial to be aware of this potentially fatal disease,” he emphasized.
The federal Centers for Disease Control and Prevention recently made several controversial changes to its childhood vaccination schedule, reducing the number of vaccines recommended for children. Notably, meningococcal vaccines are no longer broadly recommended but are instead suggested for specific high-risk groups, leaving the decision to vaccinate up to parents and healthcare providers for those not deemed high risk.
These new recommendations have faced criticism from doctors and health experts. The American Academy of Pediatrics, based in Itasca, has introduced its own vaccination schedule that still recommends meningococcal disease vaccinations widely, a stance endorsed by numerous prominent medical organizations, including the American Medical Association in Chicago.
