The changes were based on research by the Department of Health and Human Services (HHS) that compared childhood immunisation recommendations in the country to those of peer nations. President Donald Trump has signed an executive order (EO) that significantly narrows the recommendations for paediatric immunisation, marking the latest attempt from the US government to overhaul the country’s vaccine landscape. “There is no new evidence to justify significant changes to childhood immunisation guidance. The Trump administration’s previous attempts to overhaul childhood vaccine recommendations have faced legal challenges. Following the upheaval, the AAP filed a lawsuit against HHS and its chief Robert F Kennedy (RFK) Jr challenging changes to vaccine recommendations.