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Skipping the vitamin K shot is putting newborns at serious risk

Fewer newborns are getting the routine vitamin K shot — and babies are paying the price. Two new JAMA studies found that the share of infants missing the shot more than doubled from 2017 to 2025, while diagnoses of vitamin K deficiency bleeding quadrupled over the same period. Researchers point to social media misinformation as a key driver of parental hesitancy.