Listen to the Trump administration’s rhetoric about vaccines and you’ll hear a refrain. In September, what replaced the government recommendation that everyone over 6 months get an annual Covid shot? “Shared clinical decision-making.” What’s at the heart of timing kids’ immunizations, according to National Institutes of Health director Jay Bhattacharya? “Shared decision-making.” In early January, what filled the vacuum when federal authorities abruptly stopped broadly endorsing vaccines against rotavirus, influenza, meningococcal disease, hepatitis A, and hepatitis B for kids who aren’t deemed high-risk? “Shared clinical decision-making.” But to researchers who’ve spent their careers advancing shared decision-making, federal health leaders may...