New York City health officials issue a warning to people who visited Central Park after a Legionnaires’ disease outbreak grows on the Upper East Side. Multiple outlets report that the outbreak centers on several Upper East Side ZIP codes, prompting officials to advise residents and recent visitors to seek medical care promptly if they develop flu-like or pneumonia-like symptoms. The reporting also indicates that the cases are concentrated around areas near Carnegie Hall and Yorkville. One outlet specifies that 14 cases have been reported as of Sunday, describing Legionnaires’ disease as a potentially fatal illness that causes pneumonia-like symptoms. Authorities urge people with symptoms to get evaluated quickly, reflecting the need for timely diagnosis and treatment. The coverage places the outbreak in an ongoing local public health response and contrasts it with prior activity in the region, including the mention that a similar illness affected Harlem last year. Overall, the information emphasizes the geographic focus on the Upper East Side, the public advisory to Central Park visitors, and the importance of medical attention for developing symptoms.