Colorado no longer ranks last in the country when it comes to the rate of toddlers getting their vaccinations on time.
The Centers for Disease Control and Prevention says 77 percent of 19- to 35-month-olds got a full series of inoculations last year against nine diseases.
That gave Colorado the 44th highest rate.
Nationwide, the figure was almost 81 percent. The government aims to have 80 percent of toddlers get their main shots on time by 2010.
In 2002 Colorado was dead last at about 63 percent, partly due to a shortage of vaccine for diphtheria, whooping cough and tetanus.
State health officials say they have been working to remind parents of when vaccines are needed and have been organizing more immunization clinics.