This type of recommendation is usually made when there is real uncertainty about the benefits and risks, said David Higgins, an assistant professor of pediatrics at the University of Colorado Anschutz Medical Campus. By applying it broadly to many vaccines that are now routinely recommended, it creates the false impression that experts are divided on the best way to protect health, he said. “I have never been more concerned about the future of vaccines and children’s health than I am now,” Higgins said.