Thousands of nurses walked off the job at major New York City hospitals on Monday after negotiations collapsed, launching one of the city’s largest healthcare strikes in years. Around 15,000 nurses from NewYork-Presbyterian, Montefiore, and Mount Sinai are demanding safer staffing levels, improved workplace security, and limits on artificial intelligence. Hospitals say the demands are too costly and insist patient care will continue. The strike comes during a severe flu season and poses an early political test for Mayor Zohran Mamdani, who has publicly backed the nurses. State officials are monitoring patient safety as talks continue.