Week of February 17, 2025

This episode discusses four MMWR reports. First, a new CDC study explores possible transmission of the virus that causes H5N1 bird flu from dairy workers to two indoor-only cats in Michigan. Second, the dengue outbreak in Puerto Rico continues, with children 10-19 years old being most affected. Third, wastewater testing and viral genetic testing can provide information on the community spread of hepatitis A. Last, scientists recorded a brief 110-fold increase in air lead levels during the 2025 LA fires.