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  • SARS-CoV-2 is moving between humans and wildlife

    In humans the pandemic is showing signs of ebbing. In white-tailed deer and other wildlife, however, infections appear widespread.
    Four white-tailed deer in a snow-covered meadow
    Recent research at Penn and elsewhere underscores that SARS-CoV-2 has jumped repeatedly between species during the COVID-19 pandemic. 

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  • Exposure to air pollution worsens Alzheimer’s disease
    Emissions from a power plant.

    Image: Pencho Chukov via Getty Images

    Exposure to air pollution worsens Alzheimer’s disease

    New research from Penn Medicine finds living in areas with high concentration of air pollution is associated with increased buildup of amyloid and tau proteins in the brains of Alzheimer’s patients, accelerating cognitive decline.

    Sep 9, 2025