This story was updated May 3, 2019 at 3:40 p.m.
Measles cases have reached a 19-year high in the U.S., but a bill in Colorado aimed at improving childhood vaccination rates didn’t succeed. It didn’t really fail, either. It just got mired in super-long hearings, pushback from the governor and, ultimately, a legislative schedule that ran out of time before the bill could reach the Senate.
“I’m still today trying to figure out exactly what happened,” says Rep. Kyle Mullica, who sponsored the bill.