Legionella Outbreak in NYC: 58 Cases and 2 Deaths in Harlem; Officials Issue Alert

An outbreak of Legionella—a bacteria that causes a severe form of pneumonia—has infected 58 peoplein Central Harlem, New York, according to the city’s Health Department. Two deaths have been confirmed so far.

Most cases are concentrated in the 10027, 10030, 10035, 10037, and 10039 zip codes, covering Harlem and surrounding neighborhoods. Authorities warn that older adults, smokers, and people with chronic lung diseases are at highest risk.

How Does the Disease Spread?

Legionella thrives in stagnant water systems, such as cooling towers, showers, pools, and fountains. Infection occurs when people inhale contaminated water droplets. The disease is not transmitted from person to person.

Symptoms and Treatment

Symptoms, which appear 2 to 14 days after exposure, include:

• High fever

• Dry cough

• Muscle aches

• Shortness of breath

• Nausea, diarrhea, and confusion (in severe cases)

Diagnosis is made through chest X-rays, urine tests, and phlegm analysis. Treatment with antibiotics like Levofloxacin and Azithromycin is effective if started early. However, 10% of cases are fatal, rising to 25% for hospitalized patients.

Authorities’ Response

NYC’s Health Department has already addressed 11 contaminated cooling towers and emphasizes the need for water system monitoring.

"Anyone with flu-like symptoms should seek medical care immediately," urged Acting Health Commissioner Dr. Michelle Morse.

How to Protect Yourself?

• Smokers should quit (tobacco use increases risk)

• Older adults and immunocompromised individuals should avoid stagnant water sources

• Buildings must implement water management programs

There is no vaccine, but prevention and early detection save lives.