A study published in JAMA last December by Dr. Kristan Scott and colleagues at CHOP showed that more than 5% of U.S. babies did not receive a vitamin K shot in 2024, a 77% increase since 2017.
The latest data, published in JAMA and JAMA Pediatrics, show rates of vitamin K refusals have continued to climb, and begin to connect the dots between rising refusals of the essential vitamin and increased bleeding episodes.