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		  The latest stories from AHA Today.
  A study published in JAMA Internal Medicine found the updated 2024-2025 COVID vaccines offered 57% protection against hospitalization and death, although their effectiveness lessened over time.
  
  A pilot study found self-contamination was less likely with single-use personal protective equipment than with extended use and extended reuse.
  
  A study found older, hospitalized patients with Clostridioides difficile infections residing in skilled nursing facilities disproportionately experienced poorer health and economic outcomes.
  
  Extreme heat is likely to increase pregnancy risks, according to researchers at Project Heatwave, an initiative seeking to improve research on preventing deaths caused by extreme heat.
  
  The American Heart Association released a scientific statement maintaining disruptions to people’s circadian rhythm can increase their risk of cardiovascular disease and other conditions such as obesity, Type 2 diabetes and high blood pressure. 
  
  The American Hospital Association responded to the Office of Science and Technology Policy request for information on artificial intelligence regulatory reform.
  
  In a comment letter, the American Hospital Association said the Department of Homeland Security’s proposed revised H-1B visa selection process could lead to workforce shortages, particularly in rural areas.
  
  The American Hospital Association and Press Ganey released a workbook to guide users on ways to foster a culture of workforce accountability.
  
  The American Hospital Association invites applicants to speak at the AHA Leadership Summit July 12-14 in Denver.
  
  Nursing leaders at the Veterans Health Administration describe how they implemented an evidence-based practice course for 106 nurses at 17 facilities.
  
 
              