A federal judge has issued a stay blocking changes to vaccine recommendations made by the Trump administration, affecting guidance for several vaccines including flu and COVID-19 shots from the Centers for Disease Control and Prevention.

The judicial action has resulted in some vaccines losing their CDC recommendations following overhauls initiated by the White House. The stay may impact vaccine access in certain states that rely on federal guidance for their immunization programs.

The Advisory Committee on Immunization Practices (ACIP), which typically provides vaccine recommendations to the CDC, has been halted as part of the broader changes. During the halt, no new vaccine recommendations can be issued by the committee.

The Trump administration had implemented what officials described as overhauls to routine vaccine recommendations, with the changes having potential long-term implications for vaccine access and development. Health officials made unilateral modifications to existing vaccine guidance as part of these efforts.

The situation creates uncertainty around vaccine policy as the judicial stay leaves the status of various vaccine recommendations in flux. The outcome may affect both current vaccine access and future vaccine development programs that depend on federal guidance and recommendations.