President Donald Trump is giving his endorsement to a January study by the Department of Health and Human Services that calls for cutting the number of vaccines recommended for every American child. An executive order that Trump signed on Friday directs federal agencies to align their policies behind the study, which recommended an overhaul long called for by Health Secretary Robert F. Kennedy Jr. The study found that the United States recommends more childhood vaccines than many peer nations. The study recommends vaccinating all children against 11 diseases. Several others would be moved to a category of vaccines recommended only for high-risk groups or if doctors recommend it.