Two more people have died in connection with the Legionnaires' disease cluster on Manhattan's Upper East Side, raising the confirmed death toll to nine, city health officials said Friday afternoon. Both patients had been diagnosed weeks earlier, and one of the two was a case already on the books that investigators have since reclassified as connected to the cluster.
The announcement came roughly two weeks after the city told residents that transmission tied to the cluster had ended. Health Commissioner Dr. Alister Martin, who confirmed the deaths in a statement posted on X, said the source of exposure has been eliminated. "We mourn each loss, and our hearts are with their loved ones," he wrote, adding that "these cases were diagnosed weeks ago, and the source has been eliminated." One person connected to the cluster remains hospitalized.
That combination is why this development still matters for families in Carnegie Hill and Yorkville. An epidemiological all-clear describes the air outside. It does not describe the patients who were already in hospital beds when the announcement was made, and it does not mean the investigation has produced an answer.
Nine Deaths and Still No Named Cooling Tower
The city has counted 92 diagnosed cases and more than 70 hospitalizations since the first infections were identified in the neighborhood on July 2, according to the New York City Health Department. The toll now exceeds the seven deaths recorded in last summer's Harlem cluster.
What officials still have not established is which cooling tower produced the contaminated mist. The department tested 183 cooling towers at 160 buildings. Of those, 77 towers at 75 buildings screened positive by PCR, and 59 towers at 58 buildings tested culture positive, confirming live bacteria. All culture-positive towers have been cleaned and disinfected. Earlier press accounts cited lower counts because they reflected interim results released while confirmatory cultures were still coming in; the department's cooling tower inspection results are searchable by address.
Genetic sequencing that compares bacteria from patient samples with bacteria from tower samples is underway, with results expected by the end of August, Patch reported. Until that match is made, no building owner has been publicly identified as responsible, and the department has cautioned that a culture-positive tower may or may not be the source.
The sequence of events explains how nine deaths can follow an all-clear without contradicting it. Legionnaires' disease has an incubation period of roughly two to 14 days, so the city measures the end of exposure by counting forward from the most recent diagnoses. Deaths, by contrast, can arrive weeks later among patients whose infections were already established. The city's last case count update reported no cases diagnosed after July 21 and said ongoing transmission related to the cluster had ended. The two deaths announced Friday were counted against infections that began well before that point.
An All Clear Issued While a Patient Was Still Hospitalized
Attorney Ronald Katter announced one of the two deaths on behalf of a client's family. Katter said the man battled the illness for more than four weeks in a hospital intensive care unit and died just as he was about to be discharged to a skilled nursing facility, in a statement reported by Gothamist. Gothamist reported that the firm declined to identify him. The New York Daily News reported that Katter described the client as a 92-year-old man who lived in an East 89th Street building that did not test positive for Legionella.
Katter told ABC7 that he represents ten Upper East Side residents sickened in the outbreak, and he has previously said his clients are waiting for confirmation of which building owner to sue before filing. No claim has been tested in court, and no negligence has been established.
City Council Speaker Julie Menin, who represents the district and has publicly criticized the pace of the city's response, said she was deeply saddened to learn of the two additional deaths, including the case reclassified as connected to the cluster. Menin has said the Council will hold an oversight hearing in September on the administration's handling of the outbreak.
The Enforcement Record Behind the Rooftops
The inspection data give residents something concrete to weigh. About 60 percent of the 183 towers inspected in the outbreak zone received at least one violation, according to Patch. A building at 300 East 83rd Street drew 11 violations totaling $11,000 tied to an unregistered cooling tower that had not been sampled for Legionella in more than a year. A second address, 1520 York Avenue, drew nine violations totaling $9,000. Citations are allegations rather than final adjudications, and none has been linked to a specific infection.
New York already requires building owners to register cooling towers, test the water routinely, and remediate promptly when Legionella is found. A violation rate that high across a small slice of Manhattan is an enforcement question rather than a medical one, and it is the question likely to determine whether next summer looks different.
Symptoms That Still Warrant a Call
People who spent time in ZIP codes 10028, 10075, or 10128 during July and later developed pneumonia symptoms should tell a clinician about that exposure. Legionnaires' disease begins with fever, chills, muscle aches, and cough, and can also bring headache, fatigue, loss of appetite, diarrhea, or confusion, usually two to 14 days after exposure. It is treatable with antibiotics, and the CDC reports that about one in ten people who get sick will die from complications.
The Health Department lists the highest risk among people 50 and older, people who smoke or vape, those with chronic heart, lung, kidney, or liver disease or diabetes, and people with weakened immune systems. A urine antigen test is not ordered routinely unless a provider is prompted to consider it, so mentioning the neighborhood matters. Difficulty breathing, chest pain, high fever, or sudden confusion warrant urgent evaluation. Tap water, home air conditioning, and showers in the area remain safe, and the disease does not spread person to person.
MedicalDaily previously reported that New York ended its response without confirming a source tower. The sequencing results are the next verified milestone, along with any adjudication of the outstanding violations and the Council's September hearing. New Yorkers who need help finding a provider, regardless of insurance or immigration status, can call 311.
Key Questions Answered
What changed this week? The city confirmed two additional deaths connected to the Upper East Side cluster, bringing the total to nine. One was a previously reported case reclassified as outbreak-related.
Does this mean the outbreak restarted? No. Health officials say both patients were diagnosed weeks ago, that no new cases have been reported in more than three weeks, and that the source of exposure has been eliminated.
Has the source building been identified? Not yet. Genetic sequencing comparing patient and cooling tower samples is expected to conclude by the end of August.
Who faces the highest risk? People 50 and older, people who smoke or vape, those with chronic heart, lung, kidney, or liver disease or diabetes, and people with weakened immune systems.
Is the water safe? Yes. The Health Department says Legionnaires' disease is not caused by a building's plumbing system and cannot be contracted from drinking water or from air conditioner-cooled air.
How many cooling towers held live bacteria? The department reported 59 cooling towers at 58 buildings as culture positive out of 183 towers tested. All have been cleaned and disinfected.
What should someone who was in the area do now? Anyone who develops pneumonia symptoms after being in the outbreak zone should contact a clinician and mention the possible exposure so a Legionella urine antigen test can be considered.
