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Boy giving stop sign asking for social distancing, focus on hand

Staying safe COVID-19

Boy giving stop sign asking for social distancing to protect his grandmother, focus on hand/ Image by Kzenon at https://stock.adobe.com/contributor/200443522/kzenon?load_type=author&prev_url=detail

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Aging & Geriatrics

Photobiomodulation, the use of light waves to change human biology, has boomed in recent years for all kinds of purposes, at medical clinics and at home. We wanted to know what the science says — and doesn’t say.