Their efforts may be in vein. Medical experts have been strongly advising new parents to make sure their newborns receive a specific vitamin shot to prevent a potentially fatal condition characterized by internal or external bleeding. For a new study , National Institutes of Health researchers analyzed more than 5 million health records between 2017 and 2024. They discovered that 5.2% of newborns did not receive a vitamin K injection at birth — almost 200,000 newborns — and noted a 77% increase