The Denver Post is reports:

A bill that would make it more difficult for parents to exempt their children from vaccines — legislation that has consumed the General Assembly during the final days of the session — died Thursday.

Democrats, who had sponsored the bill, delayed debate on it until Friday, effectively killing it.

“Everything we do up here has a cost. It costs you something to pass a bill. It costs you time, energy, resources,” Sen. Owen Hill, R-Colorado Springs, said after the bill died. “This shows it wasn’t worth the (Democrats’) time and energy. This wasn’t a big enough priority.”

House Bill 1312 looked like it might make it through before the end of session after it passed out of a Senate committee Wednesday night over the objections of Republicans and parents who showed up by the hundreds to testify in opposition. The committee limited testimony to two hours per side, angering opponents.