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Black-and-white photo of newborn babies in a hospital nursery Geoff Charles, CC BY-SA 4.0

More US newborns are missing the vitamin K shot, and bleeding risk is higher, study finds

A JAMA study of more than 5.2 million US births found the share of newborns not given vitamin K more than doubled between 2017 and 2025, and those infants had higher rates of bleeding, including bleeding in the brain.

Science Comlumen Desk 3 min read

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    More US newborns are missing the vitamin K shot, and bleeding risk is higher, study finds

    A JAMA study of more than 5.2 million US births found the share of newborns not given vitamin K more than doubled between 2017 and 2025, and those infants had higher rates of bleeding, including bleeding in the brain.