The state health lab reported Sunday that the weekend passed with no new presumptive positive tests for COVID-19, the disease caused by the new coronavirus.
The state conducted 83 tests on Saturday and Sunday with no new positive results.
Colorado still has eight known presumptive positive cases, the first of which was made public on Thursday. Most of those people traveled internationally; at least one is believed to have contracted the virus in California. Investigations into some of the cases are ongoing.
All of the people known to have the disease are in isolation, in either Denver, Douglas, Eagle, El Paso or Jefferson counties, where a man who had been visiting Summit County went after being diagnosed.
There is a ninth case with a possible Colorado connection, but it is not known how close that connection might be. The state announced Sunday that a woman in her 20s who had been visiting Aspen returned to Australia last week where she tested positive for the illness.
An investigation is underway. Some of the people with whom she interacted in Aspen have reported experiencing "respiratory symptoms," according to the state release.
For more information about how COVID-19 spreads and how to avoid getting sick, see our frequently asked questions.