2023 sees New York City's record high leptospirosis cases, linked to increased rat populations and climate change factors.
New York City has seen a record high of human leptospirosis cases, a disease caused by rat urine, with 24 diagnoses in 2023 and six in 2024, linked to a rise in rat populations (3 million) since 2010. The city's Department of Health issued an advisory, noting climate change factors such as excessive rain and unseasonably warm temperatures may contribute to the persistence of leptospirosis.
April 12, 2024
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