Trump's vaccine plan would require millions of individual shots last used decades ago

President Trump ordered that combination vaccines like MMR be split into separate shots and that vaccinations be spaced out to give parents more timing options.
Public health experts call the move unscientific, saying it would mean many more doctor visits, higher costs and likely lower vaccination rates.
Drugmakers and regulators say re‑making and approving individual vaccines would take years and tens of millions of dollars, making widespread implementation unlikely.