The number of children with M. pneumoniae-associated community-acquired pneumonia (CAP) discharged from U.S. pediatric hospitals increased sharply in 2024, accounting for approximately half of hospitalized children with CAP in spring and summer.
Enterobacterales, a type of gram-negative bacteria, can become resistant to broad-spectrum carbapenem antibiotics through production of carbapenemases. Although the most common carbapenemase in the United States is Klebsiella pneumoniae carbapenemase, New-Delhi metallo-β-lactamase, previously associated with returning international travelers, has become the most common carbapenemase in New York City. Providers should be aware of the trend and of predominant carbapenemases within their clinical settings when initiating antibiotic treatment of Enterobacterales infections.
After low rates during pandemic years (2021–2023), parvovirus B19 activity in 2024 exceeded pre-COVID-19 pandemic years. B19 test data for 2025 indicate further continued increase in transmission compared to 2024, particularly among people aged 10–14 and 15–44.
In response to a survey distributed August 1 to September 14, 2023, 39% of cooling center visitors and 49% of the public reported lack of awareness of cooling centers as a barrier to using them.
