Colorado’s vaccination rate for measles is one percentage point lower than needed to reach herd immunity, according to the state epidemiologist with the health department.
“What we call the community immunity or herd immunity threshold for measles is about 95 percent. So statewide we are falling short of that. So that does mean that Colorado is potentially at risk for outbreaks,” said the state epidemiologist, Rachel Herlihy.
But the day after Colorado’s first known case of measles was reported in Pueblo, state health leaders said there is also some good news.