Research conducted by Perplexity AI using the following sources:

• Trump signs vaccine executive order calling for fewer routine vaccines for kids
• Trump order aims to cut number of diseases all children are vaccinated against
• Fact Sheet: President Donald J. Trump Realigns U.S. Core Childhood Vaccine Recommendations with Best Practices from Peer Developed Countries
• CDC Acts on Presidential Memorandum to Update Childhood Immunization Schedule
• Trump signs order to limit childhood vaccines and split MMR shot