A federal judge in Massachusetts on Monday blocked the govt

A federal judge in Massachusetts on Monday blocked the government from implementing a series of decisions on vaccines made over the last year by Health Secretary Robert F. Kennedy Jr.

The ruling also reversed, at least for the time being, all decisions made by the panelists that Mr. Kennedy appointed to the Advisory Committee for Immunization Practices, which makes recommendations on which vaccines Americans should take. The court decision will prevent the committee from meeting later this week, as it was scheduled to do.